{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T01:09:49Z","timestamp":1760144989264,"version":"build-2065373602"},"reference-count":28,"publisher":"MDPI AG","issue":"11","license":[{"start":{"date-parts":[[2024,6,3]],"date-time":"2024-06-03T00:00:00Z","timestamp":1717372800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Materials"],"abstract":"<jats:p>A new hydrothermal hot isostatic pressing (HHIP) approach, involving hydrothermal water conditions and no usage of inert gas, was hypothesized and tested on 3D-printed Al-10%Si-0.3%Mg (%Wt) parts. The aluminum-based metal was practically inert at the applied HHIPing conditions of 300\u2013350 MPa and 250\u2013350 \u00b0C, which enabled the employment of a long (6\u201324 h) HHIP treatment with hardly any loss of material (the overall loss due to corrosion was mostly &lt;0.5% w\/w). Applying the new approach on the above-mentioned samples resulted in an 85.7% reduction in the AM micro-pores, along with a 90.8% reduction in the pores\u2019 surface area at a temperature of 350 \u00b0C, which is much lower than the 500\u2013520 \u00b0C applied in common argon-based aluminum HIPing treatments, while practically maintaining the as-recieved microstructure. These results show that better mechanical properties can be expected when using the suggested treatment without affecting the material fatigue resistance due to grain growth. The proof of concept presented in this work can pave the way to applying the new HHIPing approach to other AM metal parts.<\/jats:p>","DOI":"10.3390\/ma17112716","type":"journal-article","created":{"date-parts":[[2024,6,3]],"date-time":"2024-06-03T10:08:38Z","timestamp":1717409318000},"page":"2716","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Hydrothermal Hot Isostatic Pressing (HHIP)\u2014Experimental Proof of Concept"],"prefix":"10.3390","volume":"17","author":[{"given":"Yaron","family":"Aviezer","sequence":"first","affiliation":[{"name":"Faculty of Civil and Environmental Engineering, Technion\u2014Israel Institute of Technology, Haifa 32000, Israel"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2080-1211","authenticated-orcid":false,"given":"Shmuel","family":"Ariely","sequence":"additional","affiliation":[{"name":"Israel Institute of Materials Manufacturing Technologies, Technion\u2014Israel Institute of Technology, Haifa 32000, Israel"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Menachem","family":"Bamberger","sequence":"additional","affiliation":[{"name":"Department of Materials Science and Engineering, Technion\u2014Israel Institute of Technology, Haifa 32000, Israel"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Denis","family":"Zolotaryov","sequence":"additional","affiliation":[{"name":"Israel Institute of Materials Manufacturing Technologies, Technion\u2014Israel Institute of Technology, Haifa 32000, Israel"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Shai","family":"Essel","sequence":"additional","affiliation":[{"name":"Faculty of Mechanical Engineering, Technion\u2014Israel Institute of Technology, Haifa 32000, Israel"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ori","family":"Lahav","sequence":"additional","affiliation":[{"name":"Faculty of Civil and Environmental Engineering, Technion\u2014Israel Institute of Technology, Haifa 32000, Israel"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2024,6,3]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1150","DOI":"10.1007\/s11837-018-3298-x","article-title":"Effect of Post-heat Treatment on the Corrosion Behavior of AlSi10Mg Alloy Produced by Additive Manufacturing","volume":"71","author":"Zakay","year":"2019","journal-title":"JOM"},{"key":"ref_2","doi-asserted-by":"crossref","unstructured":"du Plessis, A., and Macdonald, E. (2020). Hot isostatic pressing in metal additive manufacturing: X-ray tomography reveals details of pore closure. Addit. Manuf., 34.","DOI":"10.1016\/j.addma.2020.101191"},{"key":"ref_3","doi-asserted-by":"crossref","unstructured":"Herzog, D., Bartsch, K., and Bossen, B. (2020). Productivity optimization of laser powder bed fusion by hot isostatic pressing. Addit. Manuf., 36.","DOI":"10.1016\/j.addma.2020.101494"},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"9726","DOI":"10.1007\/s10853-022-07027-9","article-title":"Hot isostatic pressing of laser powder bed fusion AlSi10Mg: Parameter identification and mechanical properties","volume":"57","author":"Zhao","year":"2022","journal-title":"J. Mater. Sci."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"1421","DOI":"10.1108\/RPJ-07-2019-0180","article-title":"Effect of HIP process and subsequent heat treatment on microstructure and mechanical properties of direct metal laser sintered AlSi10Mg alloy","volume":"26","year":"2020","journal-title":"Rapid Prototyp. J."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"2981","DOI":"10.1007\/s11661-000-0078-2","article-title":"Fundamental Aspects of Hot Isostatic Pressing: An Overview","volume":"31A","author":"Atkinson","year":"2000","journal-title":"Metall. Mater. Trans. A"},{"key":"ref_7","unstructured":"(2017). Standard Guide for Hot Isostatic Pressing (HIP) of Aluminum Alloy Castings 1 (Standard No. ASTM B998-17)."},{"key":"ref_8","unstructured":"(2018). Standard for Additive Manufacturing-Finished Part Properties-Specification for AlSi10Mg with Powder Bed Fusion-Laser Beam 1 (Standard No. ASTM F3318-18)."},{"key":"ref_9","doi-asserted-by":"crossref","unstructured":"Hirata, T., Kimura, T., and Nakamoto, T. (2020). Effects of hot isostatic pressing and internal porosity on the performance of selective laser melted AlSi10Mg alloys. Mater. Sci. Eng. A, 772.","DOI":"10.1016\/j.msea.2019.138713"},{"key":"ref_10","doi-asserted-by":"crossref","unstructured":"Gheysen, J., Tingaud, D., Villanova, J., Hocini, A., and Simar, A. (2023). Exceptional fatigue life and ductility of new liquid healing hot isostatic pressing especially tailored for additive manufactured aluminum alloys. Scr. Mater., 233.","DOI":"10.1016\/j.scriptamat.2023.115512"},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"33","DOI":"10.1016\/j.scriptamat.2017.10.004","article-title":"Influence of hot isostatic pressing on the performance of aluminum alloy fabricated by ultrasonic additive manufacturing","volume":"145","author":"Gussev","year":"2018","journal-title":"Scr. Mater."},{"key":"ref_12","doi-asserted-by":"crossref","unstructured":"Schneller, W., Leitner, M., Springer, S., Gr\u00fcn, F., and Taschauer, M. (2019). Effect of hip treatment on microstructure and fatigue strength of selectively laser melted AlSi10Mg. J. Manuf. Mater. Process., 3.","DOI":"10.3390\/jmmp3010016"},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"229","DOI":"10.1016\/j.msea.2017.08.027","article-title":"Fatigue of AlSi10Mg specimens fabricated by additive manufacturing selective laser melting (AM-SLM)","volume":"704","author":"Uzan","year":"2017","journal-title":"Mater. Sci. Eng. A"},{"key":"ref_14","unstructured":"Ahlfors, M. (2024, March 18). Cost Effective Hot Isostatic Pressing\u2014A Cost Calculation Study for AM Parts. Available online: https:\/\/www.researchgate.net\/publication\/327561578."},{"key":"ref_15","doi-asserted-by":"crossref","unstructured":"Neikov, O.D., Naboychenko, S.S., and Yefimov, N.A. (2019). Handbook of Non-Ferrous Metal Powders, Elsevier. [2nd ed.].","DOI":"10.1016\/B978-0-08-100543-9.00009-9"},{"key":"ref_16","doi-asserted-by":"crossref","unstructured":"Cuesta, I.I., Mart\u00ednez-Pa\u00f1eda, E., D\u00edaz, A., and Alegre, J.M. (2019). Cold isostatic pressing to improve the mechanical performance of additively manufactured metallic components. Materials, 12.","DOI":"10.3390\/ma12152495"},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"57","DOI":"10.1007\/BF00720075","article-title":"Fabrication of phosphate-bonded mica ceramics by hot isostatic processing","volume":"3","author":"Hattori","year":"1984","journal-title":"J. Mater. Sci. Lett."},{"key":"ref_18","doi-asserted-by":"crossref","unstructured":"Hattori, T., Shigemori, A., Mohri, J.I., Yoshimura, M., and Somiya, S. (1982). Fabrication of Nonadditive Mica Ceramics by Hot Isostatic Processing. Commun. Am. Ceram. Soc., 65.","DOI":"10.1111\/j.1151-2916.1982.tb10518.x"},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"12335","DOI":"10.1039\/D2RA01231F","article-title":"Hydrogen production rates of aluminum reacting with varying densities of supercritical water","volume":"12","author":"Trowell","year":"2022","journal-title":"RSC Adv."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"3394","DOI":"10.1039\/D2SE00592A","article-title":"Hydrogen production via reaction of metals with supercritical water","volume":"6","author":"Trowell","year":"2022","journal-title":"Sustain. Energy Fuels"},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"5628","DOI":"10.1039\/D0SE00996B","article-title":"The use of supercritical water for the catalyst-free oxidation of coarse aluminum for hydrogen production","volume":"4","author":"Trowell","year":"2020","journal-title":"Sustain. Energy Fuels"},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"291","DOI":"10.1016\/j.corsci.2012.02.002","article-title":"Pourbaix diagrams for chromium, aluminum and titanium extended to high-subcritical and low-supercritical conditions","volume":"58","author":"Cook","year":"2012","journal-title":"Corros. Sci."},{"key":"ref_23","doi-asserted-by":"crossref","unstructured":"Parkhurst, D.L., and Appelo, C.A.J. (2013). Description of input and examples for PHREEQC version 3: A computer program for speciation, batch-reaction, one-dimensional transport, and inverse geochemical calculations. US Geol. Surv. Tech. Methods, 6, Available online: https:\/\/pubs.usgs.gov\/tm\/06\/a43\/.","DOI":"10.3133\/tm6A43"},{"key":"ref_24","unstructured":"United Aluminum (2023, May 13). Aluminum Alloy 6061 Data Sheet. Available online: https:\/\/unitedaluminum.com\/6061-aluminum-alloy\/."},{"key":"ref_25","unstructured":"United Aluminum (2023, May 13). Aluminum Alloy 2024 Data Sheet. Available online: https:\/\/unitedaluminum.com\/2024-aluminum-alloy\/."},{"key":"ref_26","unstructured":"EOS Metal Solutions (2023, May 13). EOS Aluminum AlSi10Mg Material Data Sheet. Available online: https:\/\/www.eos.info\/03_system-related-assets\/material-related-contents\/metal-materials-and-examples\/metal-material-datasheet\/aluminium\/material_datasheet_eos_aluminium-alsi10mg_en_web.pdf."},{"key":"ref_27","first-page":"257","article-title":"High-temperature mechanical properties of AlSi10Mg specimens fabricated by additive manufacturing using selective laser melting technologies (AM-SLM)","volume":"24","author":"Uzan","year":"2018","journal-title":"Addit. Manuf."},{"key":"ref_28","doi-asserted-by":"crossref","unstructured":"Fiocchi, J., Tuissi, A., and Biffi, C.A. (2021). Heat treatment of aluminum alloys produced by laser powder bed fusion: A review. Mater. Des., 204.","DOI":"10.1016\/j.matdes.2021.109651"}],"container-title":["Materials"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1996-1944\/17\/11\/2716\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,10]],"date-time":"2025-10-10T14:53:07Z","timestamp":1760107987000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1996-1944\/17\/11\/2716"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2024,6,3]]},"references-count":28,"journal-issue":{"issue":"11","published-online":{"date-parts":[[2024,6]]}},"alternative-id":["ma17112716"],"URL":"https:\/\/doi.org\/10.3390\/ma17112716","relation":{},"ISSN":["1996-1944"],"issn-type":[{"type":"electronic","value":"1996-1944"}],"subject":[],"published":{"date-parts":[[2024,6,3]]}}}