An investigation on the compressive strength enhancing mechanism of directionally solidified Ti-47Al-2Nb-2Cr-0.2Er alloy in case of cyclic loading
An investigation on the compressive strength enhancing mechanism of directionally solidified Ti-47Al-2Nb-2Cr-0.2Er alloy in case of cyclic loading
复制标题
循环加载下定向凝固Ti-47Al-2Nb-2Cr-0.2Er合金抗压强度增强机制研究
DOI:
10.1016/j.msea.2017.03.048
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发表时间:
2017-04
期刊:
影响因子:
--
通讯作者:
Hengzhi Fu
中科院分区:
文献类型:
--
作者:
Qiang Wang;Hongsheng Ding;Hailong Zhang;Ruirun Chen;Jingjie Guo;Hengzhi Fu
In the present study the microstructure evolutions and compressive strengths of the directionally solidified Ti-47Al-2Nb-2Cr-0.2Er alloy undergoing single and cyclic loadings are studied. It is found that bending in lamellar structure can be caused by compression and the extent of this bend exacerbates with the increase of compression strain. For the sample under cyclic-loading, the density of dislocation is improved, resulting in a higher compressive strength in comparison with the sample subjected to single loading with the same strain. Enhancements of Peierls stress, long-range elastic interactions between dislocations, and jog quantity all contribute to the higher strength of the cyclic-loading sample. Dislocation loops releasing from the semi-coherent interfaces under the applied stress are the main dislocation multiplication mechanism during the room temperature compression.
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影响因子:
6.2
作者:
通讯作者:
--
影响因子:
1.2
作者:
Liang, Y.F.;Shang, S.L.;Liu, Z.K.;Lin, J.P.
通讯作者:
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DOI:
10.1016/j.msea.2008.12.027
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H. Ding;Ruirun Chen;Jingjie Guo;Weisheng Bi;Daming Xu;H. Fu