A consideration of intergranular fracture caused by trace impurity sodium in an Al-5 wt.%Mg alloy

被引：13

作者：

Chen, X. -M. ^{[1
]}

Song, S. -H. ^{[1
]}

Weng, L. -Q. ^{[1
]}

Wang, K. ^{[2
]}

机构：

[1] Harbin Inst Technol, Shenzhen Grad Sch, Dept Mat Sci & Engn, Shenzhen Key Lab Adv Mat, Shenzhen 518055, Peoples R China

[2] Cent Iron & Steel Res Inst, Superalloy Dept, Beijing 100081, Peoples R China

来源：

SCRIPTA MATERIALIA | 2008年 / 58卷 / 10期

基金：

中国国家自然科学基金;

关键词：

grain boundaries; segregation; aluminium alloys; embrittlement; mathematical modelling;

D O I：

10.1016/j.scriptamat.2008.01.007

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A newly developed model of deformation-induced non-equilibrium grain boundary segregation is used to analyze the intergranular fracture caused by trace impurity sodium in an Al-5 wt.%Mg alloy, which is responsible for a hot ductility trough in the range 150-400 degrees C. Predictions of sodium grain boundary segregation indicate that a sodium segregation peak corresponds to the ductility trough. It is proposed that the ductility trough is mainly caused by sodium segregation-induced grain boundary embrittlement. (C) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：902 / 905

页数：4

共 19 条

[1]

[Anonymous], 1992, GEN PHYS PROPERTIES

[2]

Faulkner RG, 1996, MATER SCI TECH SER, V12, P904, DOI 10.1179/026708396790122152

[3] Intergranular fracture caused by trace impurities in an Al-5.5 mol% Mg alloy [J].