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Effect of structural stability on the stress induced martensitic transformation in Ti-10V-2Fe-3Al alloy

机译：结构稳定性对Ti-10V-2Fe-3Al合金应力诱导马氏体相变的影响

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摘要

Structural stability has a very important effect on the stress induced martensitic transformation in Ti-10V-2Fe-3Al alloy owing to its metastable nature. In the present study, we reported the stress induced martensitic transformation characteristics of Ti-10V-2Fe-3Al specimens with different structural stability endowed by heat treatments. Despite different phase constitutions and morphologies derived by solution treatments in single beta phase region and alpha + beta phase region, these specimens exhibit relatively low structural stability and double yielding behavior due to stress induced martensitic transformation. In comparison with the solution treatments in single beta phase region, solution treatments in alpha + beta phase region give rise to higher structural stability and triggering stress for stress induced martensitic transformation. Although numerous nanoscale omega particles are distributed in the beta matrix of solution treated specimens before and after tensile deformation, Ti-10V-2Fe-3Al alloy demonstrate excellent ductility and toughness. The universal expressions for describing the relationship between beta matrix and omega phase in Ti-10V-2Fe-3Al alloy can be given as follows: {1 (1) over bar1}(beta)//(001)(omega) and 011 (beta)// 100 (omega).
机译：由于Ti-10V-2Fe-3Al合金的亚稳特性，其结构稳定性对应力诱发的马氏体相变具有非常重要的影响。在本研究中，我们报道了热处理赋予的具有不同结构稳定性的Ti-10V-2Fe-3Al试样应力诱导的马氏体转变特征。尽管在单个β相区和α+β相区通过固溶处理获得了不同的相组成和形态，但这些试样由于应力诱导的马氏体相变而表现出相对较低的结构稳定性和双屈服行为。与在单个β相区域中的固溶处理相比，在α+β相区域中的固溶处理产生更高的结构稳定性，并触发应力引起的马氏体转变。尽管在拉伸变形前后，许多纳米级的欧米伽粒子分布在固溶体试样的β基质中，但Ti-10V-2Fe-3Al合金具有出色的延展性和韧性。描述Ti-10V-2Fe-3Al合金中β基质与ω相之间关系的通用表达式可以给出如下：{1（1）在bar1上}β//（001）ω且<011 >（beta）// <100>（Ω）。

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