Achieving fine-grained Ti-V-Al light weight shape memory alloys with higher transformation temperature, superior performances by doping Gd
Achieving fine-grained Ti-V-Al light weight shape memory alloys with higher transformation temperature, superior performances by doping Gd
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通过掺杂Gd实现相变温度更高、性能优越的细晶Ti-V-Al轻质形状记忆合金
DOI：
10.1016/j.matchar.2020.110534
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发表时间：
2020-10
影响因子：
4.7
通讯作者：
Cai Wei
中科院分区：
文献类型：
--
作者：
Yi Xiaoyang;Sun Kuishan;Sun Bin;Wang Haizhen;Li Bin;Gao Zhiyong;Meng Xianglong;Cai Wei
研究了Gd对合金显微组织、马氏体相变和应变恢复特性的影响。Gd的加入使合金的晶粒尺寸明显减小，并形成富Gd相。Gdr ich相被鉴定为具有正交结构的Gd-3（Ti，V）相。固溶处理后的（Ti-13 V-3Al）（100-x）Gd-x合金在加热过程中发生α-> β相变，与Gd含量无关。但Gd的加入使马氏体相变温度略有下降。此外，适量Gd的加入可使合金获得优异的力学性能和功能性能，这是由于晶粒细化和晶粒内部富Gd相的析出强化相结合的结果。Gd含量最佳的Ti-V-Al合金为含0.3at.% Gd的Ti-V-Al合金Gd，在6%的预应变和925 MPa的极限拉伸应力下显示出4.9%的最大可恢复应变。Ti-V-Al合金的延伸率为20.7%，比纯Ti-V-Al合金的延伸率高0.3at.%已添加GD。
Effect of Gd addition on microstructure, martensitic transformation and strain recovery characteristics was investigated. Gd addition resulted in the significant reduction of grain size and formation of Gd-rich phase. The Gdrich phase was identified as Gd-3(Ti,V) phase with an orthorhombic structure. The solution treated (Ti-13V-3Al)(100-x)Gd-x alloys underwent a alpha '' -> beta transformation during heating, irrespective of Gd content. But Gd addition led to a slight drop of martensitic transformation temperatures. In addition, the moderate Gd addition can promote the achievement of outstanding mechanical and functional properties due to the combination of the grain refinement and precipitation strengthening of Gd-rich phase in grain interior. Ti-V-Al alloy with an optimal Gd content, which was Ti-V-Al alloy containing 0.3 at.% Gd, showed the largest recoverable strain of 4.9% at a pre-strain of 6% and the ultimate tensile stress of 925 MPa. Meanwhile, Ti-V-Al alloy had a superior elongation of 20.7%, as 0.3 at.% Gd was added.
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影响因子：
1.4
作者：
H. Okamoto
通讯作者：
H. Okamoto
影响因子：
2.2
作者：
A. Ojha;H. Sehitoglu
通讯作者：
A. Ojha;H. Sehitoglu
DOI：
10.1016/j.msea.2018.09.064
发表时间：
2018-09
期刊：
Materials Science and Engineering: A
影响因子：
--
作者：
Bala Narasimha Guniputi;S. M. Murigendrappa
通讯作者：
Bala Narasimha Guniputi;S. M. Murigendrappa
DOI：
10.1016/j.msea.2019.03.022
发表时间：
2019-04
期刊：
Materials Science and Engineering: A
影响因子：
--
作者：
P. Dalvand;S. Raygan;G. López;Mariano B. Meléndez;V. Chernenko
通讯作者：
P. Dalvand;S. Raygan;G. López;Mariano B. Meléndez;V. Chernenko
影响因子：
6
作者：
J. Sui;Xin Zhang;Xiaohang Zheng;Zheyi Yang;W. Cai;X. Tian
通讯作者：
J. Sui;Xin Zhang;Xiaohang Zheng;Zheyi Yang;W. Cai;X. Tian