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材料工程  2012 

显微组织对TA15合金高温拉伸性能的影响

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Keywords: TA15钛合金,高温拉伸性能,显微组织,α相含量及形貌,β晶粒尺寸

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Abstract:

研究了显微组织变化对TA15合金500℃高温拉伸性能的影响。结果表明初生α相含量增加、α相方向性增强、次生α片变厚及β晶粒尺寸变粗大等显微组织的变化,可使TA15合金500℃高温抗拉强度降低,最大降幅达90MPa以上。研究表明,随初生α相含量增加,增多了晶界数量,而随温度升高晶界强度比晶粒强度下降快,导致高温抗拉强度随初生α相含量增加而降低。

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