Growth rates dependence of macro/microstructures and mechanical properties of Ti-47Al-2Nb-2Cr-0.2Er alloy directionally solidified by cold crucible
Growth rates dependence of macro/microstructures and mechanical properties of Ti-47Al-2Nb-2Cr-0.2Er alloy directionally solidified by cold crucible
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冷坩埚定向凝固Ti-47Al-2Nb-2Cr-0.2Er合金宏观/微观组织和力学性能对生长速率的依赖性
DOI:
10.1016/j.matdes.2017.04.013
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发表时间:
2017-07
影响因子:
8.4
通讯作者:
Hengzhi Fu
中科院分区:
文献类型:
--
作者:
Qiang Wang;Hongsheng Ding;Hailong Zhang;Shiqiu Liu;Ruirun Chen;Jingjie Guo;Hengzhi Fu
IntermetallicsTi-47Al-2Nb-2Cr-0.2Er alloys are prepared at different growth rates ranging from 0.6 mm/min to 1.2 mm/min via cold crucible directional solidification with the power of 50 kW. The macro/microstructure evolutions and mechanical properties of the directionally solidified ingots are studied in details. The angles between the columnar grains and the growth direction increase gradually from the center to the edge of the ingot. The lamellae orientations show no distinct variations under the growth rates of 0.6–1.0 mm/min, while the lamellae orientation deviates significantly from the growth direction at the growth rate of 1.2 mm/min. The interlamellar spacing is inverse proportional to the growth rate. The alloy with finer interlamellar spacing shows higher nanoindentation hardness. The corresponding relationship between nanoindentation hardness (HN) and interlamellar spacing (λ) can be fitted byHN= 36.3λ− 0.254. Hindrance of the semi-coherent interface to dislocation movement results in higher tensile strength of the alloy and the larger tensile elongation can be attributed to the improvement of the deformation uniformity.
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影响因子:
1.2
作者:
Liang, Y.F.;Shang, S.L.;Liu, Z.K.;Lin, J.P.
通讯作者:
Lin, J.P.
影响因子:
1.6
作者:
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通讯作者:
H. Inui;Y. Toda;Y. Shirai;M. Yamaguchi
DOI:
10.1016/j.msea.2015.03.041
发表时间:
2015-05
影响因子:
6.4
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M. R. Kabir;M. Bartsch;L. Chernova;K. Kelm;J. Wischek
通讯作者:
M. R. Kabir;M. Bartsch;L. Chernova;K. Kelm;J. Wischek
影响因子:
6.2
作者:
Jianglei Fan;Xinzhong Li;Yan-Qing Su;Jingjie Guo;H. Fu
通讯作者:
Jianglei Fan;Xinzhong Li;Yan-Qing Su;Jingjie Guo;H. Fu
DOI:
10.1016/s0921-5093(01)01494-0
发表时间:
2002-06
影响因子:
6.4
作者:
In-Soo Jung;Hs Jang;M. Oh;J. Lee;D. Wee
通讯作者:
In-Soo Jung;Hs Jang;M. Oh;J. Lee;D. Wee