Microstructure Evolution and Mechanical Behavior of Ni-rich Ni-Mn-Ga Alloys under Compressive and Tensile Stresses
Microstructure Evolution and Mechanical Behavior of Ni-rich Ni-Mn-Ga Alloys under Compressive and Tensile Stresses
复制标题
压拉应力下富镍 Ni-Mn-Ga 合金的显微组织演变和力学行为
DOI：
10.1016/j.jmst.2021.04.040
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发表时间：
2021-06
影响因子：
10.9
通讯作者：
Xi Li
中科院分区：
文献类型：
--
作者：
Yue Wang;Siyuan Yang;Ting Zhou;Long Hou;Lansong Ba;Yves Fautrelle;Zhongming Ren;Yanyan Zhu;Zongbin Li;Xi Li
研究了名义成分为ni58mn25ga17和ni60mn25ga15的富Ni-Mn-Ga定向凝固合金在压应力和拉应力作用下的组织演变和力学行为。成分分布表明，Ni元素偏析在γ相，而Mn和Ga元素偏析在马氏体相。电子背散射衍射（EBSD）分析表明，ni60mn25ga15合金中β相具有(001)γ γ的优先生长取向，而β相具有(001)γ的优先生长取向。断口形貌表明，在ni60mn25ga15合金中，韧性γ相的存在可以减小裂纹扩展，提高断裂应变。最后，计算了施密德因子和变形梯度张量，较好地解释了在压缩和拉应力作用下失孪过程中的结晶演变。本研究结果不仅阐明了γ相对富Ni-Mn-Ga合金力学行为的影响机理，而且为高温Ni-Mn-Ga形状记忆合金的成分设计提供了思路。
The microstructure evolution and mechanical behavior in directionally solidified Ni-rich Ni-Mn-Ga alloys with nominal compositions of Ni58Mn25Ga17and Ni60Mn25Ga15under compressive and tensile stresses have been investigated. The composition distribution shows the element Ni segregates in gamma phase, while elements Mn and Ga segregate in martensite phase. Furthermore, the microstructure orientation examined by electron backscatter diffraction (EBSD) indicates that beta phase has a preferred growth orientation of (001)Ain Ni58Mn25Ga17alloys, while gamma phase has a preferred growth orientation of (001)γin Ni60Mn25Ga15alloys. The fracture morphology suggests that the existence of ductile γ phase can reduce the crack propagation and promote fracture strain, particularly in the Ni60Mn25Ga15alloys. Finally, Schmid factor and deformation gradient tensor were calculated to well explain the crystallographic evolution during the detwinning under compressive and tensile stresses. The present findings not only elucidate the mechanism of γ phase on the mechanical behavior of Ni-rich Ni-Mn-Ga alloys, but also shed light on the composition design of high temperature Ni-Mn-Ga shape memory alloys.
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Ni-Mn-In变磁形状记忆合金中调制马氏体的变体组织和机械解孪
影响因子：
9.4
作者：
Yan Haile;Yang Bo;Zhang Yudong;Li Zongbin;Esling Claude;Zhao Xiang;Zuo Liang
通讯作者：
Zuo Liang
影响因子：
6
作者：
Yan Li;Y. Xin;Chengbao Jiang;Huibin Xu
通讯作者：
Yan Li;Y. Xin;Chengbao Jiang;Huibin Xu
DOI：
10.1007/s11661-005-0338-2
发表时间：
2005-08-01
影响因子：
2.8
作者：
Ganesan, M;Dye, D;Lee, PD
通讯作者：
Lee, PD
影响因子：
6
作者：
R. Chulist;W. Skrotzki;C. Oertel;A. Böhm;M. Pötschke
通讯作者：
R. Chulist;W. Skrotzki;C. Oertel;A. Böhm;M. Pötschke
DOI：
10.1016/j.cossms.2006.02.010
发表时间：
2005-12
影响因子：
11
作者：
Huibin Xu;Jingmin Wang;Chengbao Jiang;Yan Li
通讯作者：
Huibin Xu;Jingmin Wang;Chengbao Jiang;Yan Li