Ti-6Al-4V钛合金网篮组织与拉伸性能 定量关系研究

Quantitative analysis on microstructure-tensile property relationship for Ti-6Al-4V alloy with basket weave structure

摘要:

建立钛合金显微组织-拉伸性能定量关系对于组织性能的控制及优化具有重要意义。本文基于定量金相学和体视学原理，利用多元非线性回归方法建立了Ti-6Al-4V钛合金网篮组织-拉伸性能定量关系模型。模型自变量包括片状α相厚度、片状α相长宽比，因变量为合金的室温拉伸性能。经验证表明，所建立的多元回归模型对合金的拉伸性能具有较高的预测精度，说明模型的构建方法是可行的。

Abstract:

It is of great value for the control and optimation of titanium alloy''s properties by establishing its microstructure-tensile property relationship. Based on quantitative metallography and Stereology, the quantitative relationship between microstructure and tensile property for Ti-6Al-4V alloy with basket-weave structure is establised using multielement non-linear regression in present paper. In this model, the independent variables including lamellar α phase’s thickness and lamellar α phase’s aspect ratio, and the dependent variables are Ti-6Al-4V alloy’s tensile properties. Results show that the multiple regression model built in present paper can precisely describe the microstructure-tensile property relationship of Ti-6Al-4V alloy with basket-weave structure, which indicates that the mehod of establishing model used in present paper is applicable.