Phase Transformation and Residual Stress in a Laser Beam Spot-Welded TiAl-Based Alloy

被引：10

作者：

Liu, Jie ^{[1
,2
]}

Staron, Peter ^{[5
]}

Riekehr, Stefan ^{[3
]}

Stark, Andreas ^{[6
]}

Schell, Norbert ^{[5
]}

Huber, Norbert ^{[7
,8
]}

Schreyer, Andreas ^{[4
,9
]}

Mueller, Martin ^{[4
]}

Kashaev, Nikolai ^{[3
]}

机构：

[1] Helmholtz Zentrum Geesthacht, Inst Mat Res, Max Planck Str 1, D-21502 Geesthacht, Germany

[2] Robert Bosch GmbH, Laser Welding Proc, Borstig 2, D-96052 Bamberg, Germany

[3] Helmholtz Zentrum Geesthacht, Inst Mat Res, Dept Joining & Assessment, Geesthacht, Germany

[4] Helmholtz Zentrum Geesthacht, Inst Mat Res, Mat Phys, Geesthacht, Germany

[5] Helmholtz Zentrum Geesthacht, Inst Mat Res, Dept Xray Diffract Synchrotron Radiat, Geesthacht, Germany

[6] Helmholtz Zentrum Geesthacht, Inst Mat Res, Dept Met Phys, Geesthacht, Germany

[7] Helmholtz Zentrum Geesthacht, Inst Mat Res, Div Mat Mech, Geesthacht, Germany

[8] Helmholtz Zentrum Geesthacht, Inst Mat Res, Helmholtz Programme Adv Engn Mat, Geesthacht, Germany

[9] European Spallat Source ERIC, POB 176, S-22100 Lund, Sweden

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2016年 / 47A卷 / 12期

关键词：

GAMMA-TITANIUM ALUMINIDE; X-RAY-DIFFRACTION; GRAIN-REFINEMENT; IN-SITU; MECHANICAL-PROPERTIES; HEAT-TREATMENT; MICROSTRUCTURE; EQUILIBRIA; EVOLUTION; ADDITIONS;

D O I：

10.1007/s11661-016-3745-7

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The microstructure, chemical composition, residual stress, and lattice parameter evolution of the welding zone (WZ) and heat-affected zone (HAZ) of a laser-beam-welded TiAl-based alloy were investigated. It was found that both alpha (2) and gamma phases remain highly restrained in the WZ edge, and the stresses are relieved in the HAZ. A grain refinement mechanism is proposed, which works by heating the material to the beta or alpha + beta phase field for a short time. The lamellar colonies are refined by the Nb-enriched segregations.

引用

页码：5750 / 5760

页数：11

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