{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,13]],"date-time":"2026-03-13T06:18:38Z","timestamp":1773382718733,"version":"3.50.1"},"reference-count":19,"publisher":"Emerald","issue":"3","license":[{"start":{"date-parts":[[2015,5,18]],"date-time":"2015-05-18T00:00:00Z","timestamp":1431907200000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.emerald.com\/insight\/site-policies"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IR"],"published-print":{"date-parts":[[2015,5,18]]},"abstract":"<jats:sec>\n<jats:title content-type=\"abstract-subheading\">Purpose<\/jats:title>\n<jats:p>The purpose of this paper is to evaluate the tool experiences using torque during welding as a means of in-process sensing for tool wear. Metal matrix composites (MMCs) are materials with immense potential for aerospace structural applications. The major barrier to implementation of these materials is manufacturability, specifically joining MMCs to themselves or other materials using fusion welding. Friction stir welding (FSW) is an excellent candidate process for joining MMCs, as it occurs below the melting point of the material, thus precluding the formation of degradative intermetallics\u2019 phases present in fusion welded joints. The limiting factor for use of FSW in this application is wear of the tool. The abrasive particles which give MMCs their enhanced properties progressively erode the tool features that facilitate vertical mixing and consolidation of material during welding, resulting in joints with porosity. While wear can be mitigated by careful selection of process parameters and\/or the use of harder tool materials, these approaches have significant complexities and limitations.<\/jats:p>\n<\/jats:sec>\n<jats:sec>\n<jats:title content-type=\"abstract-subheading\">Design\/methodology\/approach<\/jats:title>\n<jats:p>This study evaluates using the torque the tool experiences during welding as a means of in-process sensing for tool wear. Process signals were collected during linear FSW of Al 359\/SiC\/20p and correlated with wear of the tool probe. The results of these experiments demonstrate that there is a correlation between torque and wear, and the torque process signal can potentially be exploited to monitor and control tool wear during welding.<\/jats:p>\n<\/jats:sec>\n<jats:sec>\n<jats:title content-type=\"abstract-subheading\">Findings<\/jats:title>\n<jats:p>Radial deterioration of the probe during joining of MMCs by FSW corresponds to a decrease in the torque experienced by the tool. Experimentally observed relationship between torque and wear opens the door to the development of in-process sensing, as the decay in the torque signal can be correlated to the amount of volume lost by the probe. The decay function for tool wear in FSW of a particular MMC can be determined experimentally using the methodology presented here. The decay of the torque signal as the tool loses volume presents a potential method for control of the wear process.<\/jats:p>\n<\/jats:sec>\n<jats:sec>\n<jats:title content-type=\"abstract-subheading\">Originality\/value<\/jats:title>\n<jats:p>This work has near-term commercial applications, as a means of monitoring and controlling wear in process could serve to grow commercial use of MMCs and expand the design space for these materials beyond net or near-net-shape parts.<\/jats:p>\n<\/jats:sec>","DOI":"10.1108\/ir-01-2015-0007","type":"journal-article","created":{"date-parts":[[2015,5,26]],"date-time":"2015-05-26T10:16:27Z","timestamp":1432635387000},"page":"192-199","source":"Crossref","is-referenced-by-count":8,"title":["Evaluation of torque as a means of in-process sensing of tool wear in friction stir welding of metal matrix composites"],"prefix":"10.1108","volume":"42","author":[{"given":"Tracie","family":"Prater","sequence":"first","affiliation":[]},{"given":"Brian","family":"Gibson","sequence":"additional","affiliation":[]},{"given":"Chase","family":"Cox","sequence":"additional","affiliation":[]},{"given":"George E.","family":"Cook","sequence":"additional","affiliation":[]},{"given":"Al","family":"Strauss","sequence":"additional","affiliation":[]},{"given":"William","family":"Longhurst","sequence":"additional","affiliation":[]}],"member":"140","reference":[{"issue":"7","key":"key2020122403491195000_ref001","first-page":"229s","article-title":"Material flow behavior during friction stir welding of aluminum","volume":"75","year":"1999","journal-title":"Supplement to The Welding Journal"},{"issue":"1","key":"key2020122403491195000_ref002","first-page":"100","article-title":"Diamond tool performance in machining metal matrix composites","volume":"128","year":"2002","journal-title":"Journal of Materials Processing Technology"},{"key":"key2020122403491195000_ref003","unstructured":"Ding, J., Carter, B., Lawless, K., Nunes, A. 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(2006), \u201cA decade of friction stir welding R&D at NASA\u2019s marshall space flight center and a glance into the future\u201d, NASA Technical Report 20080009619, NASA Marshall Space Flight Center, Huntsville, AL."},{"issue":"8","key":"key2020122403491195000_ref004","first-page":"1293","article-title":"Adaptive torque control of friction stir welding for the purpose of estimating tool wear","volume":"225","year":"2011","journal-title":"Part B: Journal of Engineering Manufacture"},{"issue":"10","key":"key2020122403491195000_ref005","doi-asserted-by":"crossref","first-page":"4012","DOI":"10.1016\/j.matdes.2009.05.023","article-title":"The application of shoulderless conical tools in friction stir welding: an experimental and theoretical study","volume":"30","year":"2009","journal-title":"Materials and Design"},{"issue":"2","key":"key2020122403491195000_ref006","doi-asserted-by":"crossref","first-page":"161","DOI":"10.1016\/S0043-1648(00)00524-X","article-title":"Tool wear acceleration in relation to workpiece reinforcement percentage in cutting of metal matrix composites","volume":"247","year":"2001","journal-title":"Wear"},{"key":"key2020122403491195000_ref007","unstructured":"Longhurst, W.R. (2009), \u201cForce control of friction stir welding\u201d, PhD Dissertation, Vanderbilt University, Nashville."},{"issue":"9\/12","key":"key2020122403491195000_ref008","first-page":"905","article-title":"Torque control of friction stir welding for manufacturing and automation","volume":"51","year":"2010","journal-title":"The International Journal of Advanced Manufacturing Technology"},{"key":"key2020122403491195000_ref009","doi-asserted-by":"crossref","unstructured":"Mishra, R.S. and Ma, Z.Y. (2005), \u201cFriction stir welding and processing\u201d, Materials Science and Engineering R: Reports, Vol. 50 Nos 1\/2, pp. 1-78.","DOI":"10.1016\/j.mser.2005.07.001"},{"issue":"1","key":"key2020122403491195000_ref010","doi-asserted-by":"crossref","first-page":"225","DOI":"10.1016\/j.jmatprotec.2008.01.041","article-title":"Optimization of machining parameters of Al\/Sic-MMC with ANOVA and ANN analysis","volume":"209","year":"2009","journal-title":"Journal of Materials Processing Technology"},{"key":"key2020122403491195000_ref011","unstructured":"Nunes, A.C., Bernstein, E.L. and McClure, J.C. (2000), \u201cA rotating plug model of friction stir welding\u201d, paper presented at 81st American Welding Society Annual Convention, Chicago, IL, November."},{"issue":"1","key":"key2020122403491195000_ref012","first-page":"156","article-title":"Self-optimization in tool wear for friction stir welding of Al 6061 + 20% Al2O3 MMC","volume":"349","year":"2003","journal-title":"Materials Science and Engineering: A"},{"key":"key2020122403491195000_ref014","article-title":"Parameterization of friction stir welding of Al 6061\/SiC\/17.5 p for various tool materials","year":"2008"},{"issue":"11","key":"key2020122403491195000_ref016","doi-asserted-by":"crossref","first-page":"2759","DOI":"10.1177\/0954406212438987","article-title":"Dimensional analysis and a potential classification algorithm for prediction of wear in friction stir welding of metal matrix composites","volume":"226","year":"2012","journal-title":"Part C; Journal of Mechanical Engineering Science"},{"issue":"6","key":"key2020122403491195000_ref017","doi-asserted-by":"crossref","first-page":"1807","DOI":"10.1007\/s11665-012-0468-9","article-title":"A comparative evaluation of the wear resistance of various tool materials in friction stir welding of metal matrix composites","volume":"22","year":"2013","journal-title":"Journal of Materials Engineering and Performance"},{"issue":"4","key":"key2020122403491195000_ref013","doi-asserted-by":"crossref","first-page":"636","DOI":"10.1080\/10426914.2010.492055","article-title":"Solid-State joining of metal matrix composites: a survey of challenges and potential solutions","volume":"26","year":"2011","journal-title":"Materials and Manufacturing Processes"},{"issue":"8","key":"key2020122403491195000_ref018","doi-asserted-by":"crossref","first-page":"3757","DOI":"10.1007\/s11661-013-1701-3","article-title":"A phemonenological model for tool wear in friction stir welding of metal matrix composites","volume":"44","year":"2013","journal-title":"Metallurgical and Materials Transactions A"},{"issue":"1","key":"key2020122403491195000_ref015","first-page":"1","article-title":"Statistical modeling and prediction of wear in friction stir welding of a metal matrix composite (Al 350\/SiC\/20p)","volume":"1","year":"2010","journal-title":"Journal of Manufacturing Technology Research"},{"issue":"11","key":"key2020122403491195000_ref019","first-page":"3237","article-title":"Fusion and friction stir welding of aluminum-metal-matrix composites","volume":"38","year":"2005","journal-title":"Metallurgical and Materials Transactions A"}],"container-title":["Industrial Robot: An International Journal"],"original-title":[],"language":"en","link":[{"URL":"http:\/\/www.emeraldinsight.com\/doi\/full-xml\/10.1108\/IR-01-2015-0007","content-type":"unspecified","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/www.emerald.com\/insight\/content\/doi\/10.1108\/IR-01-2015-0007\/full\/xml","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/www.emerald.com\/insight\/content\/doi\/10.1108\/IR-01-2015-0007\/full\/html","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,7,24]],"date-time":"2025-07-24T21:38:05Z","timestamp":1753393085000},"score":1,"resource":{"primary":{"URL":"http:\/\/www.emerald.com\/ir\/article\/42\/3\/192-199\/176272"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2015,5,18]]},"references-count":19,"journal-issue":{"issue":"3","published-print":{"date-parts":[[2015,5,18]]}},"alternative-id":["10.1108\/IR-01-2015-0007"],"URL":"https:\/\/doi.org\/10.1108\/ir-01-2015-0007","relation":{},"ISSN":["0143-991X"],"issn-type":[{"value":"0143-991X","type":"print"}],"subject":[],"published":{"date-parts":[[2015,5,18]]}}}