Study on the microstructure in a friction stir welded 2519-T87 Al alloy

被引：34

作者：

Liang, Xiao-peng ^{[1
,2
]}

Li, Hui-zhong ^{[1
,2
]}

Li, Zhou ^{[1
]}

Hong, Tao ^{[3
]}

Ma, Bing ^{[3
]}

Liu, Sheng-dan ^{[1
]}

Liu, Yong ^{[2
]}

机构：

[1] Cent S Univ, Minist Educ, Key Lab Nonferrous Metall Mat Sci & Engn, Changsha 410083, Peoples R China

[2] Cent S Univ, State Key Lab Powder Met, Changsha 410083, Peoples R China

[3] Xin Jiang Joinworld Co Ltd, Urumqi 830013, Peoples R China

来源：

MATERIALS & DESIGN | 2012年 / 35卷

关键词：

ALUMINUM-ALLOY; MECHANICAL-PROPERTIES; PRECIPITATION; JOINTS; PARAMETERS; EVOLUTION; STRENGTH; HARDNESS; TEM;

D O I：

10.1016/j.matdes.2011.10.009

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The microhardness, grain size and distribution of the precipitates in various zones of a 2519-T87 aluminum alloy welded joint welded by friction stir welded were investigated. The dynamic recrystallization occurred in the weld nugget zone and the size of recrystallized grains was smaller than that in the thermo-mechanically affected zone, besides, theta' and theta phase precipitated. The thermo-mechanically affected zone was divided into three ones: the zone close to the thermo-mechanically affected zone, where coarse theta' precipitates were observed; the middle zone, where the mainly theta precipitates appeared; and the zone close to the heat-affected zone, where both thin theta' and theta precipitates were observed. In the heat-affected zone, the size of theta' precipitates was less than those in the base metal zone. On the transverse cross-section of welded joint the microhardness curve shows a W-shape. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：603 / 608

页数：6

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