A multiphase mechanical model for Ti-6Al-4V: Application to the modeling of laser assisted processing

被引：20
|
作者：
Longuet, A. [1 ]
Robert, Y. [1 ,2 ,3 ]
Aeby-Gautier, E. [3 ]
Appolaire, B. [3 ]
Mariage, J. F. [2 ]
Colin, C. [1 ]
Cailletaud, G. [1 ]
机构：
[1] CNRS, Ctr Mat, Mines Paristech, UMR 7633, F-91003 Evry, France
[2] CEA Valduc, Lab Calcul & Simulat, F-21120 Is Sur Tille, France
[3] Ecole Mines, F-54042 Nancy, France
来源：
COMPUTATIONAL MATERIALS SCIENCE | 2009年 / 46卷 / 03期
关键词：
Ti-6Al-4V; Multiphase model; Mechanical model; Finite element; Laser assisted process; MODERATE TEMPERATURES; BEHAVIOR; DEFORMATION;
D O I：
10.1016/j.commatsci.2009.05.012
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A multiphase model for Ti-6Al-4V is proposed. This material is widely used in industrial applications and so needs accurate behaviour modeling. Tests have been performed in the temperature range from 25 degrees C to 1020 degrees C and at strain rates between 10(-3) s(-1) and 1 s(-1). This allowed the identification of a multiphase mechanical model coupled with a metallurgical model. The behaviour of each phase is calibrated by solving an inverse problem including a phase transformation model and a mechanical model to simulate tests under thermomechanical loadings. A scale transition rule (beta-rule) is proposed in order to represent the redistribution of local stresses linked to the heterogeneity of plastic strain. Finally this model is applied to two laser assisted processes: direct laser fabrication and laser welding. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码：761 / 766
页数：6
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