本文利用Ｘ射线衍射及透射电镜分析研究了元素Ｃｒ，Ｎｉ对Ｆｅ－Ｍｎ－Ｓｉ合金ｃ／ａ值及形变诱发ε马氏体显微组织的影响．结果表明：添加Ｃｒ，Ｎｉ后．合金的ｃ／ａ值由１．６２０提高至１．６５６，其结果使合金中的ｆｃｃ形变孪晶易形成：通过在孪晶内形成ε马氏体，可避免不同取向马氏体之间的穿越过程，从而有利于合金的记忆效应．
Effects of elements Cr and Ni on the c/a ratio and stress-induced ε martensite microstructure in Fe-Mn-Si alloy have been investigated, by using X-ray and analytic electron microscope. The results show that by addition of Cr and Ni, c/a ratio in Fe-Mn-Si alloy has been increased from 1.620 to 1.656 and this is favourable to the formation of fec deformation twin. The penetration process of ε martensites on different {111}plane can be avoided through the formation of ε martensite in fcc twin, which is responsible for the better shape memory effect in Fe-Mn-Si-Cr-Ni alloy.
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| [9] | OtsukaH,YamadaH,MuruyamaT,TanahashiH,MatsudaS,MurakamiM,ISIJInternational,1990 |
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