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361005, China Received 21 January 2010; accepted 10 May 2010 Abstract: The microstructure, martensitic transformation behavior, mechanical and shape memory properties of Ni56Mn25-xCrxGa19 (x=0, 2, 4... a residual strain of 3.5 % for x=6, respectively. Key words: martensitic transformation; tension; ductility; high-temperature shape-memory effect 1 Introduction In the last decade, the Heusler Ni......
马氏体相变中应变自协调效应的三维相场研究满蛟1,张骥华1,戎咏华1(1.上海市上海交通大学材料科学与工程学院)摘 要:本文通过三维相场模型,模拟了孪晶结构马氏体的生长,计算了马氏体生长过程中的能量变化.结果表明,在马氏体变体长大阶段,随演变时间的延长,对于2个变体马氏体组成的体系,其总弹性应变能增加;而对于3个马氏体变体组成的体系,其总弹性应变能降低.本文的相场模拟揭示了3个马氏体变体具有最佳的的应变自协调效应.关键词:三维相场模拟； 能量分析； 马氏体相变； 微观组织演化； 自协调效应......
高锰TRIP/TWIP钢压缩过程晶体学行为的EBSD分析 Ⅰ.相变特点,孪生及奥氏体取向的影响杨平1,鲁法云1,孟利1,崔凤娥1(1.北京市北京科技大学材料学院)摘 要:本文利用EBSD技术研究了高锰钢压缩形变过程中γ→ε→α′马氏体相变的晶体学特点,分析了奥氏体孪生与奥氏体晶粒取向对相变的影响.结果表明,由于α′马氏体在2个ε变体的交叉处形成,而ε相变区域普遍存在奥氏体形变孪晶并且ε可在孪晶界上形成,因此孪生对相变起着重要的作用;而孪生的难易受奥氏体取向的影响.分析认为,低指数的{100},{111}和{11......
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equation shows that the recovery stress characteristics have a close relation to the thermoelastic martensitic transformation characteristics. For TiNi binary alloys, the transformation temperature... prestrain level, resulting in the decrease of the recovery stress rate. Key words: shape memory alloys; TiNi; TiNiCu; recovery stress; thermoelastic martensitic transformation 形状记忆合金(SMA)在马氏体态变形后, 加热可以......
analyzer and X-ray stress analyzer respectively. Meanwhile, the martensitic transformation temperatures of matrix, hard-face welding (hardfacing) metal welded by conventional hardfacing electrode...) of temperature and stress fields was established. In this FEM, the effect of martensitic transformation on residual stress of hardfacing metal of medium-high carbon steel was taken into account. The results......
-grains and leads to transformation of an austenitic single crystal into a textured polycrystal.It has been shown that multipleγ-α-γ-martensitic phase transitions change the mechanism of internal stress...Effect of Multiple Martensitic Transformations on Structure of Fe-Ni AlloysV.Danilchenko1,Ie.Dzevin1,V.Sagaradze21. G.V.Kurdyumov Institute of Metal Physics,NAS of Ukraine,Kiev,Ukraine2. Institute......
memory alloy; Sn substitution; Co-Ni-Al alloy; microstructure; martensitic transformation 1 Introduction Ferromagnetic shape memory alloys (FSMAs) have been attracted considerable attention due...,Ga) [6], Ni-Fe-(Al,Ga) [7-9] and Cu-Mn-(Al,Ga) [10,11] alloys, have been also reported as new FSMAs candidates. The martensitic phase transformation in the ferromagnetic state in Co-Ni-Al alloy system......
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