Low temperature friction stir welding of P91 steel

被引：25

作者：

Kalvala, Prasad Rao ^{[1
]}

Akram, Javed ^{[1
]}

Misra, Mano ^{[1
]}

Ramachandran, Damodaram ^{[2
]}

Gabbita, Janaki Ram ^{[3
]}

机构：

[1] Univ Utah, Salt Lake City, UT 84112 USA

[2] SSN Coll Engn, Kalavakkam, India

[3] Indian Inst Technol Madras, Madras, Tamil Nadu, India

来源：

DEFENCE TECHNOLOGY | 2016年 / 12卷 / 04期

关键词：

Friction stir welding; P91; Low temperature; Martensite; Carbides; Impression creep; HEAT-AFFECTED ZONE; WELDED-JOINT; CREEP;

D O I：

10.1016/j.dt.2015.11.003

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Bead-on-plate friction stir welds were made on P91 alloy with low and high rotational speeds (100 and 1000 RPM) to study their effects on weld microstructural changes and impression creep behavior. Temperatures experienced by the stir zone were recorded at the weld tool tip. Different zones of welds were characterized for their microstructural changes, hardness and creep behavior (by impression creep tests). The results were compared with submerged arc fusion weld. Studies revealed that the stir zone temperature with 100 RPM was well below Ac1 temperature of P91 steel while it was above A(c3) with 1000 RPM. The results suggest that the microstructural degradation in P91 welds can be controlled by low temperature friction stir welding technique. (C) 2016 China Ordnance Society. Production and hosting by Elsevier B.V.

引用

页码：285 / 289

页数：5

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