A proposed diffusion-controlled wear mechanism of alloy steel friction stir welding (FSW) tools used on an aluminum alloy

被引：63

作者：

Tarasov, S. Yu ^{[1
,2
]}

Rubtsov, V. E. ^{[2
]}

Kolubaev, E. A. ^{[1
,2
]}

机构：

[1] Natl Res Tomsk Polytech Univ, Tomsk, Russia

[2] Inst Strength Phys & Mat Sci SB RAS, Tomsk, Russia

来源：

WEAR | 2014年 / 318卷 / 1-2期

关键词：

Friction stir welding; Wear; Steel; Grain boundary diffusion; Intermetallic compound; Embrittlement; MATERIAL FLOW;

D O I：

10.1016/j.wear.2014.06.014

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

A study of diffusion wear mechanism in 1.2344 X40CrMoV5-1 steel FSW tool has been carried out from the standpoint of tribological layer generation and interaction with the tool's metal. It was shown that during FSW of AMg5M aluminum alloy the latter covers the tool's working surface and then iron/aluminum reaction diffusion is initiated under the conditions of high mechanical stress and temperature. Since diffusion by the former austenite grain boundaries is much faster than that of by volume an intermetallic compound is formed inside the tool's metal thus causing embrittlement and pulling out the tool's metal fragments. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：130 / 134

页数：5

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