The superplasticity and microstructure evolution of TC11 titanium alloy

The superplasticity and microstructure evolution of TC11 titanium alloy
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TC11钛合金的超塑性及显微组织演化

DOI:
10.1016/j.matdes.2011.02.062
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发表时间:
2011-08
期刊:
Materials & Design
影响因子:
--
通讯作者:
Li, M. Q.
Li, M. Q.
中科院分区:
其他
文献类型:
--
作者:
Sun, Qian Jiang;Wang, G. C.;Li, M. Q.

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超塑性是一些金属材料在失效前表现出非常高的拉伸伸长率的能力。本文在不同变形条件下进行了超塑性拉伸试验,以研究TC11钛合金的超塑性行为和显微组织演变。结果表明,晶粒尺寸越小,超塑性越好,超塑性温度和应变速率范围也越宽,其中超塑性温度范围为1023~1223K,应变速率范围为4.4×10−5~1.1×10−2s−1。在最佳变形条件(1173K和2.2×10−4s−1)下,最大拉伸伸长率为1260%。为了进一步提高TC11钛合金的超塑性,本文采用了最大m超塑性变形拉伸方法。与传统的拉伸方法相比,TC11钛合金具有优异的超塑性,其最大延伸率达到2300%。
The superplasticity is the capability of some metallic materials to exhibit very highly tensile elongation before failure. The superplastic tensile tests were carried out at various deformation conditions in this paper to investigate the superplastic behaviors and microstructure evolution of TC11 titanium alloy. The results indicate that the smaller the grain size, the better the superplasticity is, and the wider the superplastic temperature and strain rate is, in which the superplastic temperature is ranging from 1023 to 1223K and the strain rate is ranging from 4.4×10−5to 1.1×10−2s−1. The maximum tensile elongation is 1260% at the optimum deformation conditions (1173K and 2.2×10−4s−1). For further enhancing the superplasticity of TC11 titanium alloy, the novel tensile method of maximum m superplastic deformation is adopted in the paper. Compared with the conventional tensile methods, the excellent superplasticity of TC11 titanium alloy has been found with its maximum elongation of 2300%.
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