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材料工程  2011 

氢对TC21合金高温变形行为的影响

, PP. 70-75

Keywords: TC21合金,置氢,高温变形行为

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Abstract:

采用连续升温金相法研究了氢对TC21合金相变温度的影响,通过热模拟压缩实验,研究了氢对TC21合金高温变形行为的影响。结果表明置氢可以显著降低TC21合金的相变温度,置氢0.7%(质量分数,下同)的TC21合金相变温度为810℃,与未置氢合金相比,降幅达145℃;同时,置氢还可以有效降低TC21合金的流变应力,并且温度越低,应变速率越高,氢对流动应力的影响就越显著,变形温度为800℃,应变速率1s-1时,置氢0.28%后,稳态应力为202MPa,与未置氢合金相比降低了28%,相同应力水平条件下,置氢能够实现变形温度降低40℃,应变速率提高一个数量级。

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