Trigger Stress for Stress-Induced Martensitic Transformation during Tensile Deformation in Ti-Al-Nb Alloys: Effect of Grain Size
Trigger Stress for Stress-Induced Martensitic Transformation during Tensile Deformation in Ti-Al-Nb Alloys: Effect of Grain Size
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DOI：
10.1007/s11661-007-9432-y
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发表时间：
2008-02
期刊：
影响因子：
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通讯作者：
A. Paradkar;S. Kamat;A. Gogia;B. Kashyap
中科院分区：
文献类型：
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作者：
A. Paradkar;S. Kamat;A. Gogia;B. Kashyap
研究了β晶粒尺寸对Ti-Al-Nb合金拉伸变形过程中应力诱发马氏体相变触发应力的影响。Ti-Al-Nb合金应力诱发马氏体相变（SIMT）的触发应力随晶粒尺寸的变化呈现U形曲线。定性地解释了触发应力随晶粒尺寸的变化，即马氏体形成时储存在基体中的弹性内能（ΔEel）与克服晶界运动内摩擦阻力所做的不可逆功（Δ Eirr）随β晶粒尺寸的对比变化。
The effect ofβgrain size on trigger stress for stress-induced martensitic transformation during tensile deformation in Ti-Al-Nb alloys was investigated. The trigger stress for stress-induced martensitic transformation (SIMT) in Ti-Al-Nb alloys exhibited a U-shaped behavior with variation in grain size. The variation of trigger stress with grain size was explained qualitatively, in terms of the contrasting change in the internal elastic energy stored in matrix due to formation of martensite (ΔEel) and the irreversible work done in overcoming the internal frictional resistance to phase boundary movement (∂Eirr) withβgrain size.