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| High-strength nanocrystalline (nc) and ultrafine-grained (ufg) metals often show much reduced room-temperature tensile ductility compared with their coarse-grained counterparts. We discuss the various plastic and/or failure instabilities the nc and ufg metals are susceptible to, and present strategies to enhance the ductility, especially in terms of improving the uniform tensile strain |
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High-strength nanocrystalline (nc) and ultrafine-grained (ufg) metals often show much reduced room-temperature tensile ductility compared with their coarse-grained counterparts. We discuss the various plastic and/or failure instabilities the nc and ufg metals are susceptible to, and present strategies to enhance the ductility, especially in terms of improving the uniform tensile strain ¸ßÇ¿¶ÈµÄÄÉÃ×¾§£¨NC£©ºÍ³¬Ï¸¾§Á££¨UFG£©½ðÊôÍùÍù±íÏÖ³ö±È´Ö¾§Á£½ðÊôµÍºÜ¶àµÄÊÒÎÂÀÉìÕ¹ÑÓÐÔ¡£ÎÒÃÇÌÖÂÛÁËNCºÍufg½ðÊôÈÝÒ׳öÏֵĸ÷ÖÖ¿ÉËܵÄÒÔ¼°»òÖÂËðµÄ²»Îȶ¨ÐÔ£¬²¢Ìá³öÌá¸ßÕ¹ÑÓÐÔ£¬ÓÈÆäÊǸÄÉÆ¾ùÔÈÀÉìÓ¦Á¦µÄ°ì·¨¡£ |
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