淬火温度对Ti-3Al-4.5V-5Mo钛合金形变诱发马氏体的影响  

Effect of Quenching Temperature on Deformation-induced Martensite of Ti-3Al-4.5V-5Mo Titanium Alloy

作　　者：李兴无[1] 沙爱学[2] 储俊鹏[2] 张雷[1] 路民旭[1] 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083 [2]北京航空材料研究院,北京100095

出　　处：《材料工程》2007年第9期3-8,共6页Journal of Materials Engineering

摘　　要：通过测试不同淬火温度下的拉伸应力应变曲线、750-790℃淬火拉伸断裂后均匀变形区域的X射线衍射谱研究了淬火温度对Ti-3Al-4.5V-5Mo钛合金形变诱发马氏体的影响。结果表明：该合金在750-790℃淬火后拉伸变形机制为亚稳定β相变形诱发马氏体转变,790℃淬火合金在6.5%的变形量下亚稳定β相基本完全转变为α″马氏体。790℃淬火后拉伸形成应力诱发马氏体,β立方→α″σ;750℃淬火后拉伸形成应变诱发马氏体,β立方→β正方→α″ε。形变诱发α″相在拉伸变形时发生晶格重新取向：[010]α″方向平行于拉伸轴线,[100]α″方向垂直于拉伸轴线。Effect of quenching temperature on deformation-induced martensite of Ti-3Al-4.5V-5Mo titanium alloy was investigated by testing tensile stress-strain curves at different quenching temperatures and XRD patterns of uniform deformation areas of the fracture tensile samples. The result shows that the tensile deformation mechanism of the alloy quenching at 750-790℃ is deformation-induced martensite of metastable 13 phase, which is nearly fully transformed to α＂ martensite at 6.5 % deformation degree in the alloy quenching, at 790℃ Stress assisted martensite is formed through βcubic→α＂ by drawing the tensile samples quenching at 790℃ while strain-induced martensite is obtained through βcubic→βtetragonal→α＂, quenching at 750℃. Reorientation of deformation-induced α＂ martensite occurs during tensile deformation.. ;010] α″, direction parallel with tensile axis while [100] α″ direction perpendicular to tensile axis.

关 键 词：Ti-3Al-4.5V-5Mo 形变诱发马氏体 α″相 

分 类 号：TG146.23[一般工业技术—材料科学与工程]