Achieving High Strength and High Ductility in Precipitation-Hardened Alloys


  • This work was supported in part by the Light Metals Educational Foundation of Japan, in part by a Grant-in-Aid for Scientific Research from the Ministry of Education, Science, Sports and Culture of Japan and in part by the National Science Foundation of the United States under Grant No. DMR-0243331.


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Ultrafine-grained materials may be produced by applying severe plastic deformation, but these materials generally exhibit high strength and limited ductility. This report describes a technique for producing high strength and high ductility (see Figure) in precipitation-hardened alloys at ambient temperatures based on introducing intermediate metastable phases into ultrafine-grained microstructures.