Improvement of shape memory properties of NbC containing Fe-Mn-Si based shape memory alloys by simple thermomechanical treatments
Improvement of shape memory properties of NbC containing Fe-Mn-Si based shape memory alloys by simple thermomechanical treatments
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DOI：
10.1016/j.msea.2003.10.357
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发表时间：
2004-07-25
期刊：
影响因子：
6.4
通讯作者：
Shinya, N
中科院分区：
文献类型：
--
作者：
Baruj, A;Kikuchi, T;Shinya, N
系统研究了时效前预变形对含Nb和C的Fe-Mn-Si基合金形状记忆性能的影响，发现室温变形和奥氏体区高温变形均能显著提高合金的形状记忆效应。对两种代表性的含NbC的合金，即，Fe-28 Mn-6Si-5Cr-0.53Nb-0.06C和Fe-15 Mn-5Si-9 Cr-5 Ni-0.53Nb-0.06C（质量%）如下：（1）在870 K下预轧10-30%时，4%的初始应变和250-320 MPa的形状回复应力可获得约90%的形状回复;（2）在室温下预轧时，在10%轧制时，4%初始应变下的形状回复率为75%，10-30%轧制时的形状回复应力为240-320 MPa。改进的形状恢复是相当接近的那些训练的常规形状记忆合金（SMA）没有NbC和它们的形状恢复应力是训练的近两倍。(C)2004 Elsevier B. V.保留所有权利。
A systematic study of effect of pre-deformation before aging on shape memory properties in Fe-Mn-Si based alloys containing Nb and C has been performed and it is found that the room temperature (RT) deformation as well as deformation at high temperature in the austenitic range can greatly improve shape memory effect (SME). The results on two representative NbC containing alloys, i.e., Fe-28Mn-6Si-5Cr-0.53Nb-0.06C and Fe-15Mn-5Si-9Cr-5Ni-0.53Nb-0.06C (mass%) are as follows: (1) about 90% shape recovery for 4% initial strain and 250-320 MPa shape recovery stress are obtained for pre-rolling by 10-30% at 870 K and (2) in the case of pre-rolling at room temperature, 75% shape recovery for 4% initial strain is obtained with 10% rolled samples and 240-320 MPa shape recovery stress is attained for 10-30% rolling. The improved shape recoveries are fairly close to those of the trained conventional shape memory alloys (SMAs) without NbC and their shape recovery stresses are nearly twice those of the trained ones. (C) 2004 Elsevier B.V. All rights reserved.