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TC18钛合金的显微组织及拉伸性能

ZHANG Le,LIU Ying-ying,SHI Xiao-nan,SUN Yu-xing,YANG Jian

Transactions of Materials and Heat Treatment（2017）

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Abstract
对两种具有不同显微组织的TC18合金试样分别进行了室温和高温(400℃)拉伸试验,通过金相观察及断口分析,研究了组织与性能之间的关系.结果表明:显微组织对合金拉伸性能影响显著,具有等轴组织的棒材的伸长率和断面收缩率等塑性指标比具有网篮组织的锻件好,如在室温拉伸时棒材比锻件分别高4.3％和l7.3％;但棒材的抗拉强度和屈服强度等强度指标比锻件差,如在室温拉伸时棒材比锻件分别低99 MPa和97 MPa,高温拉伸时则分别低38 MPa和17 MPa.
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Key words
tensile property,microstructure,TC18 titanium alloy
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