Tailoring the mechanical properties of titanium alloys via plasticity induced transformations
Tailoring the mechanical properties of titanium alloys via plasticity induced transformations
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发表时间：
2010-07
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通讯作者：
S. Neelakantan
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作者：
S. Neelakantan
钛合金具有良好的耐腐蚀性能、高温稳定性和高的强重比。然而，在包括航空航天部门在内的最苛刻的结构应用中，它们在提供最佳强度-延性关系方面存在不足。受TRIP效应提高钢的强度-延性关系的可能性的启发，本文阐明了如何识别和量化有效控制和/或促进这种效应的关键因素（这里称为钛合金的塑性诱导相变（PiTTi）），并探索它可能导致亚稳态β钛合金的性能改善。通过实验控制有效促进这种效应的关键因素，并提出一种新的合金理论设计方法，从而获得具有改善性能潜力的钛合金新牌号。
Titanium alloys possess good corrosion properties, high temperature stability and high strength-to-weight ratio. However, they fall short in providing the optimum strength-ductility relation in the most demanding structural applications, including the aerospace sector. Inspired by the possibility of enhancing the strength-ductility relation in steels through the TRIP effect, the thesis elucidates at identifying and quantifying the key factors that effectively control and/or promote such effect (termed here as Plasticity induced Transformation in Titanium alloys (PiTTi)), and exploring the plausible property improvements it may lead in metastable beta titanium alloys. Controlling the key factors that effectively promote such effect through experimentation, and a novel theoretical alloy design methodology lead to new grades of titanium alloys with potential for improved properties.