通过不同的热处理制度控制TMZF合金中的相组成和含量,利用XRD分析确定各种相结构.利用纳米压入测量仪测试了不同组织结构下的硬度和弹性模量.结果表明,当合金中存在ω相时,合金的的硬度和弹性模量最高,随着热处理温度的提高,合金中的ω相消失,代之而来的是a相,而且越接近β转变温度,a相含量越少,对应的弹性模量和硬度越来越低.对于Ti-Mo-zr-Fe合金来说压入性能(硬度、弹性模量)与相成分之间存在着良好的匹配关系.
Microstructures of Ti-Mo-Zr-Fe alloy with different heat treatments were examined using metallurgical analysis and X-ray diffraction(XRD)analysis.The hardness and elastic modulus of the alloy were investigated by means ofnano-indentation technology.In the condition of the ω precipitating from β matrix,the hardness and elastic modulus exhibit maximum values.With increasing of heat treatment temperature,the fraction of ω phase decreases and a phase precipitates,which cause the hardness and elastic modulus decrease.When annealing temperature is close to β transition point,the hardness and elastic modulus presents minimum values.There exists good match between nano-indentation properties(hardness and modulus)and phase composition for Ti-Mo-Zr-Fe alloy.
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