工业纯钛高温拉伸性能及断口形貌

发布时间：2018-04-15 06:23

  本文选题：工业纯钛 + 高温拉伸　； 参考：《中国有色金属学报》2015年06期

【摘要】：采用锻态工业纯钛TA1标准拉伸试样,利用Gleeble-1500D热模拟试验机进行高温拉伸试验,研究其高温拉伸性能;并用SEM观察并分析工业纯钛拉伸试样断口形貌及其形成机制。结果表明:随温度升高,工业纯钛的屈服强度和抗拉强度分别从最初的83.7和94.8 MPa减小到19.3和29.6 MPa;伸长率增大,在950和1000℃时分别达到峰值36.3%和28%。在882.5℃相变转变温度以下,纯钛表现为以微孔聚集型剪切断裂为特征的韧性断裂,随温度的升高,达到相变点882.5℃,纯钛发生同素异构转变,并伴随着塑性提高,以准解理方式断裂。
[Abstract]:The tensile properties at high temperature were studied by means of Gleeble-1500D thermal simulation machine and the fracture morphology and formation mechanism of commercial pure titanium tensile specimens were observed and analyzed by SEM.The results show that the yield strength and tensile strength of commercial pure titanium decrease from 83.7 and 94.8 MPa to 19.3 and 29.6 MPA, respectively, and the elongation increases to 36.3% and 28.3% at 950C and 1000 鈩，

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