{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,18]],"date-time":"2026-08-18T04:53:57Z","timestamp":1787028837678,"version":"build-2736575974"},"reference-count":55,"publisher":"MDPI AG","issue":"13","license":[{"start":{"date-parts":[[2023,7,2]],"date-time":"2023-07-02T00:00:00Z","timestamp":1688256000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Deanship of Scientific Research at Imam Mohammad Ibn Saud Islamic University, Saudi Arabia","award":["221414016"],"award-info":[{"award-number":["221414016"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Materials"],"abstract":"<jats:p>Magnesium alloys are still attractive materials for applications that necessitate light weight due to their low density, moderate strength, and good corrosion resistance. AZ91 is one of the widely applied magnesium alloys due to its very good castability and strength. However, one of the drawbacks of magnesium alloys is the low elastic modulus. So, reinforcing AZ91 with carbon short fibers with the aim of further increasing the strength and improving the elastic modulus is investigated in this study. Squeeze cast AZ91-23 vol.% carbon short carbon (AZ91-C) and the unreinforced AZ91 are deeply examined by tensile testing at different temperatures (20, 100, 150, 200, 250, and 300 \u00b0C). Tensile stress\u2013strain curves are measured and the tensile parameters (yield stress, ultimate tensile strength and strain) are defined and presented against the test temperature. Yield stress of AZ91 at 20 \u00b0C (109 MPa) is doubled (226 MPa) in the reinforced AZ91-C. Yield stress is found to slightly decrease with increasing the test temperature. Ultimate tensile strength of AZ91 at 20 \u00b0C (198 MPa) is increased (262 MPa) in the reinforced AZ91-C. The improvement of the ultimate tensile strength due to reinforcing increases with increasing the test temperature. Flow curves are determined and described by a modified Mecking\u2013Kocks relationship and the flow parameters are determined and described as a function of the test temperature. Microstructure investigation was undertaken of the fractured tensile specimens at the grain boundaries rich in eutectic structure formed at the grain boundaries. Mixed brittle\/ductile fracture mode is detected on the fracture surface of unreinforced AZ91, while the SEM investigations show matrix\/carbon fiber detachment and fiber fracture as main fracture modes.<\/jats:p>","DOI":"10.3390\/ma16134785","type":"journal-article","created":{"date-parts":[[2023,7,3]],"date-time":"2023-07-03T00:49:27Z","timestamp":1688345367000},"page":"4785","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":12,"title":["Tensile Deformation and Fracture of Unreinforced AZ91 and Reinforced AZ91-C at Temperatures up to 300 \u00b0C"],"prefix":"10.3390","volume":"16","author":[{"given":"Nashmi H.","family":"Alrasheedi","sequence":"first","affiliation":[{"name":"Department of Mechanical Engineering, College of Engineering, Imam Mohammad Ibn Saud Islamic University, Riyadh 11432, Saudi Arabia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9229-1436","authenticated-orcid":false,"given":"Sabbah","family":"Ataya","sequence":"additional","affiliation":[{"name":"Department of Mechanical Engineering, College of Engineering, Imam Mohammad Ibn Saud Islamic University, Riyadh 11432, Saudi Arabia"},{"name":"Department of Metallurgical and Materials Engineering, Faculty of Petroleum and Mining Engineering, Suez University, Suez 43512, Egypt"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6836-3874","authenticated-orcid":false,"given":"Mohamed M.","family":"El-Sayed Seleman","sequence":"additional","affiliation":[{"name":"Department of Metallurgical and Materials Engineering, Faculty of Petroleum and Mining Engineering, Suez University, Suez 43512, Egypt"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9550-7431","authenticated-orcid":false,"given":"Mohamed M. Z.","family":"Ahmed","sequence":"additional","affiliation":[{"name":"Mechanical Engineering Department, College of Engineering at Al Kharj, Prince Sattam bin Abdulaziz University, Al Kharj 11942, Saudi Arabia"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2023,7,2]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"109","DOI":"10.1016\/j.proeng.2013.03.228","article-title":"Creep Behavior of AZ91 Magnesium Alloy","volume":"55","author":"Srinivasan","year":"2013","journal-title":"Procedia Eng."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"276","DOI":"10.1016\/S0924-0136(01)00780-4","article-title":"Research for a \u2018New Age of Magnesium\u2019 in the Automotive Industry","volume":"117","author":"Friedrich","year":"2001","journal-title":"J. Mater. Process. Technol."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"2011","DOI":"10.1016\/j.compositesa.2005.12.007","article-title":"Mechanical Properties and Damping Capacity of Magnesium Matrix Composites","volume":"37","author":"Zhang","year":"2006","journal-title":"Compos. Part A Appl. Sci. Manuf."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"400","DOI":"10.1016\/j.jallcom.2007.02.045","article-title":"Study of the Microstructure, Texture and Tensile Properties of as-Extruded AZ91 Magnesium Alloy","volume":"456","author":"Ding","year":"2008","journal-title":"J. Alloys Compd."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"196","DOI":"10.1007\/s12540-019-00318-y","article-title":"Investigation on the Creep Behavior of AZ91 Magnesium Alloy Processed by Severe Plastic Deformation","volume":"26","author":"Khoubrou","year":"2020","journal-title":"Met. Mater. Int."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"8","DOI":"10.1016\/j.jmatprotec.2017.05.001","article-title":"Effect of Friction Stir Processing on Tensile and Fracture Behaviour of AZ91 Alloy","volume":"248","author":"Raja","year":"2017","journal-title":"J. Mater. Process. Technol."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"312","DOI":"10.1007\/s11837-013-0800-3","article-title":"Heat Treatment of AZ91D Mg-Al-Zn Alloy: Microstructural Evolution and Dynamic Response","volume":"66","author":"Luong","year":"2014","journal-title":"JOM"},{"key":"ref_8","doi-asserted-by":"crossref","unstructured":"Zhang, G., Zhang, L., Lyu, S., You, C., Tian, L., and Chen, M. (2022). Effect of Pre-Heat Treatment on Microstructure and Properties of As-Extruded AZ91-CaO Alloy. Materials, 12.","DOI":"10.3390\/met12122060"},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"457","DOI":"10.1016\/j.egypro.2012.01.074","article-title":"Effects of Hot Extrusion and Heat Treatment on Mechanical Properties and Microstructures of AZ91 Magnesium Alloy","volume":"16","author":"Tan","year":"2012","journal-title":"Energy Procedia"},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"258","DOI":"10.1016\/j.jallcom.2017.03.354","article-title":"Effect of Laser Surface Melting on High Temperature Tensile Properties of AZ91D Magnesium Alloy","volume":"711","author":"Meng","year":"2017","journal-title":"J. Alloys Compd."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"318","DOI":"10.1016\/j.msea.2006.08.111","article-title":"Effects of Strontium and Titanium on the Microstructure, Tensile Properties and Creep Behavior of AM50 Alloys","volume":"444","author":"Zhao","year":"2007","journal-title":"Mater. Sci. Eng. A"},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"2583","DOI":"10.1016\/j.matdes.2011.01.040","article-title":"Microstructural Stability and High-Temperature Mechanical Properties of AZ91 and AZ91 + 2RE Magnesium Alloys","volume":"32","author":"Mahmudi","year":"2011","journal-title":"Mater. Des."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"9","DOI":"10.1016\/j.msea.2016.07.117","article-title":"Hot Tensile Deformation and Fracture Behavior of Ultrafine-Grained AZ31 Magnesium Alloy Processed by Severe Plastic Deformation","volume":"674","author":"Fata","year":"2016","journal-title":"Mater. Sci. Eng. A"},{"key":"ref_14","doi-asserted-by":"crossref","unstructured":"Ataya, S., El-Sayed Seleman, M.M., Latief, F.H., Ahmed, M.M.Z., Hajlaoui, K., Soliman, A.M., Alsaleh, N.A., and Habba, M.I.A. (2022). Wear Characteristics of Mg Alloy AZ91 Reinforced with Oriented Short Carbon Fibers. Materials, 15.","DOI":"10.3390\/ma15144841"},{"key":"ref_15","first-page":"129","article-title":"Beyond the Individual: Toward a Nomological Network of Organizational Empowerment","volume":"34","author":"Zimmerman","year":"2016","journal-title":"Am. J. Community Psychol."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"566","DOI":"10.1016\/j.jmapro.2020.07.010","article-title":"Microstructural Correlation with Tensile and Creep Properties of AZ91 Alloy in Three Casting Techniques","volume":"57","author":"Shastri","year":"2020","journal-title":"J. Manuf. Process."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"1572","DOI":"10.1016\/S1003-6326(21)65599-1","article-title":"Effect of Ca Content and Rheo-Squeeze Casting Parameters on Microstructure and Mechanical Properties of AZ91\u22121Ce\u2212xCa Alloys","volume":"31","author":"Xiao","year":"2021","journal-title":"Trans. Nonferrous Met. Soc. China"},{"key":"ref_18","doi-asserted-by":"crossref","unstructured":"Istrate, B., Munteanu, C., Cimpoesu, R., Cimpoesu, N., Popescu, O.D., and Vlad, M.D. (2021). Microstructural, Electrochemical and In Vitro Analysis of Mg-0.5ca-Xgd Biodegradable Alloys. Appl. Sci., 11.","DOI":"10.3390\/app11030981"},{"key":"ref_19","doi-asserted-by":"crossref","unstructured":"Baltatu, M.S., Spataru, M.C., Verestiuc, L., Balan, V., Solcan, C., Sandu, A.V., Geanta, V., Voiculescu, I., and Vizureanu, P. (2021). Design, Synthesis, and Preliminary Evaluation for Ti-Mo-Zr-Ta-Si Alloys for Potential Implant Applications. Materials, 14.","DOI":"10.3390\/ma14226806"},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"52","DOI":"10.1016\/j.jma.2014.12.008","article-title":"Evaluation of Physical and Mechanical Properties of AZ91D\/SiC Composites by Two Step Stir Casting Process","volume":"3","author":"Aravindan","year":"2015","journal-title":"J. Magnes. Alloy."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"5553","DOI":"10.1023\/A:1004892610575","article-title":"Improvement of Microstructure and Mechanical Properties of AZ91\/SiC Composite by Mechanical Alloying","volume":"35","author":"Lai","year":"2000","journal-title":"J. Mater. Sci."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"138","DOI":"10.1016\/j.msea.2015.03.058","article-title":"Evolutions of Microstructure and Mechanical Properties for SiCp\/AZ91 Composites with Different Particle Contents during Extrusion","volume":"636","author":"Wang","year":"2015","journal-title":"Mater. Sci. Eng. A"},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"64","DOI":"10.1016\/j.compositesb.2017.05.007","article-title":"Mechanical Behavior of AZ31\/Al2O3 Magnesium Alloy Nanocomposites Prepared Using Ultrasound Assisted Stir Casting","volume":"123","author":"Khandelwal","year":"2017","journal-title":"Compos. Part B Eng."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"843","DOI":"10.1016\/j.carbon.2015.10.018","article-title":"Microstructure and Mechanical Properties of AZ91 Alloy Reinforced by Carbon Nanotubes Coated with MgO","volume":"96","author":"Yuan","year":"2016","journal-title":"Carbon"},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"153321","DOI":"10.1016\/j.jallcom.2019.153321","article-title":"Effects of Tungsten Disulfide on Microstructure and Mechanical Properties of AZ91 Magnesium Alloy Manufactured by Stir Casting","volume":"817","author":"Huang","year":"2020","journal-title":"J. Alloys Compd."},{"key":"ref_26","first-page":"2128","article-title":"Effect of TiC Reinforcement on Mechanical and Wear Properties of AZ91 Matrix Composites","volume":"16","author":"Kumar","year":"2022","journal-title":"Int. J. Met."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"237","DOI":"10.1016\/j.jallcom.2018.11.253","article-title":"An Investigation on Grain Refinement Mechanism of TiB2 Particulate Reinforced AZ91 Composites and Its Effect on Mechanical Properties","volume":"780","author":"Xiao","year":"2019","journal-title":"J. Alloys Compd."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"85","DOI":"10.1016\/S0921-5093(96)10464-0","article-title":"Effects of SiCp Size and Volume Fraction on the High Cycle Fatigue Behavior of AZ91D Magnesium Alloy Composites","volume":"220","author":"Vaidya","year":"1996","journal-title":"Mater. Sci. Eng. A"},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"247","DOI":"10.1016\/0921-5093(91)90571-4","article-title":"Fatigue Behaviour of Short Alumina Fibre Reinforced AZ91 Magnesium Alloy Metal Matrix Composite","volume":"135","author":"Llorca","year":"1991","journal-title":"Mater. Sci. Eng. A"},{"key":"ref_30","doi-asserted-by":"crossref","unstructured":"Ataya, S., El-Sayed Seleman, M.M., Latief, F.H., Ahmed, M.M.Z., Hajlaoui, K., Elshaghoul, Y.G.Y., and Habba, M.I.A. (2022). Microstructure and Mechanical Properties of AZ91 Rein-Forced with High Volume Fraction of Oriented Short Carbon Fibers. Materials, 15.","DOI":"10.3390\/ma15144818"},{"key":"ref_31","unstructured":"Kainer, K.U. (2000). Magnesium Eigenschaften, Anwendung, Potenzial, Wiley-VHC. ISBN 10: 3527299793, ISBN 13: 9783527299799."},{"key":"ref_32","doi-asserted-by":"crossref","unstructured":"Czerwinski, F. (2021). Current Trends in Automotive Lightweighting Strategies and Materials. Materials, 14.","DOI":"10.3390\/ma14216631"},{"key":"ref_33","unstructured":"(2010). Standard Test Methods for Tension Testing of Metallic Materials 1 (Standard No. ASTM E8\/E8M)."},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"155","DOI":"10.1016\/j.commatsci.2006.03.020","article-title":"Modeling the Creep Behavior of Mg Alloys with and without Short-Fiber Reinforcement","volume":"39","author":"Ataya","year":"2007","journal-title":"Comput. Mater. Sci."},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"369","DOI":"10.1515\/htmp-2013-0083","article-title":"Hot Deformation and Processing Maps of 7005 Aluminum Alloy","volume":"33","author":"Wang","year":"2014","journal-title":"High Temp. Mater. Process."},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"626","DOI":"10.1016\/S1003-6326(14)63104-6","article-title":"Hot Compression Behavior and Processing Map of Cast Mg-4Al-2Sn-Y-Nd Alloy","volume":"24","author":"Wang","year":"2014","journal-title":"Trans. Nonferrous Met. Soc. China"},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"138076","DOI":"10.1016\/j.msea.2019.138076","article-title":"Dynamic Precipitation and Dynamic Recrystallization during Hot Deformation of a Solutionized WE43 Magnesium Alloy","volume":"762","author":"Fatemi","year":"2019","journal-title":"Mater. Sci. Eng. A"},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"173","DOI":"10.1016\/j.matchar.2018.10.031","article-title":"New Insights on the Relationship between Flow Stress Softening and Dynamic Recrystallization Behavior of Magnesium Alloy AZ31B","volume":"147","author":"Chen","year":"2019","journal-title":"Mater. Charact."},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"103074","DOI":"10.1016\/j.rinp.2020.103074","article-title":"Effect of Short Carbon Fiber Content on SCFs\/AZ31 Composite Microstructure and Mechanical Properties","volume":"17","author":"Xu","year":"2020","journal-title":"Results Phys."},{"key":"ref_40","doi-asserted-by":"crossref","first-page":"83","DOI":"10.1016\/j.actamat.2015.12.050","article-title":"Effect of Different c\/a Ratio on the Microstructure and Mechanical Properties in Magnesium Alloys Processed by ECAP","volume":"107","year":"2016","journal-title":"Acta Mater."},{"key":"ref_41","doi-asserted-by":"crossref","first-page":"15","DOI":"10.1002\/mawe.201400194","article-title":"Microstructural Characterization and Kinetics of Diffusion Bonded AZ31\/Al by Hot Press Cladding","volume":"45","author":"Harhash","year":"2014","journal-title":"Mater. Werkst."},{"key":"ref_42","doi-asserted-by":"crossref","first-page":"150","DOI":"10.1016\/j.matlet.2019.05.106","article-title":"Effect of Ca Addition on the Microstructure and Tensile Property of AE42 Alloy","volume":"252","author":"Wu","year":"2019","journal-title":"Mater. Lett."},{"key":"ref_43","doi-asserted-by":"crossref","first-page":"1511","DOI":"10.1016\/j.matlet.2005.01.012","article-title":"High Strain Rate Deformation Behavior of an AZ91 Magnesium Alloy at Elevated Temperatures","volume":"59","author":"Ishikawa","year":"2005","journal-title":"Mater. Lett."},{"key":"ref_44","first-page":"261","article-title":"Tensile Strength and Fracture Toughness of Two Magnesium Metal Matrix Composites","volume":"7","author":"Jayalakshmi","year":"2006","journal-title":"J. Ceram. Process. Res."},{"key":"ref_45","doi-asserted-by":"crossref","first-page":"1150","DOI":"10.1002\/maco.201408071","article-title":"Corrosion Behaviour of Creep-Resistant AE42 Magnesium Alloy-Based Hybrid Composites Developed for Powertrain Applications","volume":"66","author":"Mondal","year":"2015","journal-title":"Mater. Corros."},{"key":"ref_46","doi-asserted-by":"crossref","first-page":"384","DOI":"10.1016\/j.matdes.2012.02.049","article-title":"The High Temperature Flow Behavior Modeling of AZ81 Magnesium Alloy Considering Strain Effects","volume":"39","author":"Changizian","year":"2012","journal-title":"Mater. Des."},{"key":"ref_47","doi-asserted-by":"crossref","unstructured":"Totten, G.E., Xie, L., and Funatani, K. (2003). Modelling and Simulation for Material Selection and Mechanical Design, CRC Press.","DOI":"10.1201\/9780203913451"},{"key":"ref_48","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1016\/0022-5096(52)90002-1","article-title":"Plastic Instability under Plane Stress","volume":"1","author":"Swift","year":"1952","journal-title":"J. Mech. Phys. Solids"},{"key":"ref_49","first-page":"537","article-title":"Deformation, The Relationship between Stress and Strain for Homogeneous","volume":"74","author":"Voce","year":"1948","journal-title":"J. Inst. Met."},{"key":"ref_50","doi-asserted-by":"crossref","first-page":"102","DOI":"10.1016\/j.tafmec.2006.11.002","article-title":"Quasi-Static Behavior of Mg-Alloys with and without Short-Fiber Reinforcement","volume":"47","author":"Ataya","year":"2007","journal-title":"Theor. Appl. Fract. Mech."},{"key":"ref_51","doi-asserted-by":"crossref","first-page":"140","DOI":"10.1016\/j.jallcom.2010.02.042","article-title":"Microstructure and Tensile Properties of Thixomolded Magnesium Alloys","volume":"496","author":"Patel","year":"2010","journal-title":"J. Alloys Compd."},{"key":"ref_52","doi-asserted-by":"crossref","first-page":"93","DOI":"10.1016\/j.matchar.2012.02.023","article-title":"Deformation and Fracture Behavior of Hot Extruded Mg Alloys AZ31","volume":"67","author":"Lu","year":"2012","journal-title":"Mater. Charact."},{"key":"ref_53","doi-asserted-by":"crossref","first-page":"2009","DOI":"10.1016\/j.jma.2022.07.011","article-title":"Improving the Young\u2019s Modulus of Mg via Alloying and Compositing\u2014A Short Review","volume":"10","author":"Shi","year":"2022","journal-title":"J. Magnes. Alloy."},{"key":"ref_54","doi-asserted-by":"crossref","unstructured":"He, K., Zhao, J., Cheng, J., Shangguan, J., Wen, F., and Wang, Y. (2019). Influence of a Zn Interlayer on the Interfacial Microstructures and Mechanical Properties of Arc-Sprayed Al\/AZ91D Bimetals Manufactured by the Solid-Liquid Compound Casting Process. Materials, 12.","DOI":"10.3390\/ma12193273"},{"key":"ref_55","doi-asserted-by":"crossref","first-page":"99","DOI":"10.1177\/0021998315571028","article-title":"The Effect of a Particle\u2013Matrix Interface on the Young\u2019s Modulus of Al\u2013SiC Composites","volume":"50","author":"Krizik","year":"2015","journal-title":"J. Compos. Mater."}],"container-title":["Materials"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1996-1944\/16\/13\/4785\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,10]],"date-time":"2025-10-10T20:04:55Z","timestamp":1760126695000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1996-1944\/16\/13\/4785"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2023,7,2]]},"references-count":55,"journal-issue":{"issue":"13","published-online":{"date-parts":[[2023,7]]}},"alternative-id":["ma16134785"],"URL":"https:\/\/doi.org\/10.3390\/ma16134785","relation":{},"ISSN":["1996-1944"],"issn-type":[{"value":"1996-1944","type":"electronic"}],"subject":[],"published":{"date-parts":[[2023,7,2]]}}}