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

页码：761 / 766

页数：6

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