High-temperature torsion induced gradient microstructures in high Nb-TiAl alloy

High-temperature torsion induced gradient microstructures in high Nb-TiAl alloy
复制标题

高 Nb-TiAl 合金的高温扭转诱导梯度显微组织

DOI:
10.1016/j.matlet.2017.07.124
复制
发表时间:
2017-12
期刊:
影响因子:
3
通讯作者:
Liang Yongfeng
Liang Yongfeng
中科院分区:
材料科学3区
文献类型:
--
作者:
Ding Jie;Lin Junpin;Zhang Minghe;Dong Chengli;Liang Yongfeng

文献摘要

参考文献

被引文献

相似文献

研究了一种双相组织高Nb-TiAl合金在850 ° C下的高温扭转变形。实验结果表明,180 °扭转试样的硬度和孪晶密度随径向距离的增大而增大。此外,"再结晶"、"亚结构"和"变形"组织也呈梯度变化,亚晶的形成是再结晶与变形之间的过渡阶段。此外,在孪晶-孪晶交界处还发生了γ晶粒再结晶,位错-孪晶相互作用的观察表明,孪晶-孪晶交界处的位错解离形成了二次孪晶。这些位错的解离与孪晶界的相互作用以及孪-孪晶界处的γ晶粒再结晶避免了过度的应力集中,使合金能够继续塑性变形。
The high temperature torsion deformation of a duplex microstructure high Nb-TiAl alloy was investigated at 850 °C. The experimental results showed that the hardness and the density of twins increased with radial distance from the center to rim of 180° torsion sample. Besides, the “recrystallized”, “substructured” and “deformed” microstructures were also presented gradient and forming sub-grains was the transition stage between recrystallization and deformation. Moreover, γ grain recrystallization at twin-twin junctions occurred and the observation of dislocation-twin interactions revealed the formation of secondary twins by dissociating of the dislocation at twin-twin boundary. The dissociation of such dislocations interacting with twin boundaries and γ grain recrystallizations at twin-twin boundaries avoided excessive stress concentration, which allowed the alloy to continue plastic deformation.
DOI: 10.1016/j.msea.2016.09.034
发表时间: 2016-11
影响因子: 6.4
作者:
Shubo Gao;Xiangjun Xu;Z. Shen;T. Ye;Shuai Xu;Junpin Lin
通讯作者: Shubo Gao;Xiangjun Xu;Z. Shen;T. Ye;Shuai Xu;Junpin Lin
面心立方金属中非螺旋晶格位错与相格孪晶边界之间的相互作用
DOI: 10.1016/j.actamat.2007.11.020
发表时间: 2008-03-01
期刊: ACTA MATERIALIA
影响因子: 9.4
作者:
Jin, Z. -H.;Gumbsch, P.;Hahn, H.
通讯作者: Hahn, H.
DOI: 10.1016/j.intermet.2010.08.029
发表时间: 2011-02-01
期刊: INTERMETALLICS
影响因子: 4.4
作者:
Lin, J. P.;Zhao, L. L.;Chen, G. L.
通讯作者: Chen, G. L.
DOI: 10.1126/science.226.4675.636
发表时间: 1984-01-01
期刊: SCIENCE
影响因子: 56.9
作者:
LIU, CT;STIEGLER, JO
通讯作者: STIEGLER, JO
DOI: 10.1016/j.msea.2015.10.121
发表时间: 2016-01
影响因子: 6.4
作者:
M. Nikitina;R. Islamgaliev;V. Sitdikov
通讯作者: M. Nikitina;R. Islamgaliev;V. Sitdikov