An investigation of microstructural evolution in electron beam welded RAFM steel and 316LN SS dissimilar joint under creep loading conditions

被引：17

作者：

Vijayanand, V. D. ^{[1
]}

Vanaja, J. ^{[1
]}

Das, C. R. ^{[1
,2
]}

Mariappan, K. ^{[1
]}

Thakur, Abhishek ^{[3
]}

Hussain, Shamima ^{[3
]}

Reddy, G. V. Prasad ^{[1
,2
]}

Sasikala, G. ^{[1
,2
]}

Albert, S. K. ^{[1
,2
]}

机构：

[1] Indira Gandhi Ctr Atom Res, Met & Mat Grp, Kalpakkam 603102, Tamil Nadu, India

[2] Homi Bhabha Natl Inst, Kalpakkam 603102, Tamil Nadu, India

[3] UGC DAE Kalpakkam Node, Kokilamedu 603104, India

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2019年 / 742卷

关键词：

Dissimilar weld joint; Electron beam welding; Creep properties; Type IV cracking; OIM characterization; HEAT-AFFECTED ZONE; FERRITIC MARTENSITIC STEEL; IV CRACKING; METAL JOINTS; BEHAVIOR; STRENGTH; POWER; PRECIPITATION; FLOW;

D O I：

10.1016/j.msea.2018.11.046

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Microstructural evolution in creep tested electron beam welded Reduced Activation Ferritic Martensitic (RAFM) steel and 316LN stainless steel dissimilar weld joints has been studied at 823 K under different stress levels. The rupture life of the weld joints spanned between 17,596 and 190 h with variation in applied stress from 160 to 220 MPa. Failure of the weld joints occurred in the RAFM steel side at all stress levels. Microstructural examination showed that the failure location shifted from the unaffected base metal region of the RAFM steel to the 'soft region' within the heat affected zone (HAZ) in the RAFM steel side with decrease in applied stress. The strength mismatch between various regions within the HAZ of RAFM steel and the microstructural instability of 'soft region' in the RAFM steel are the two important factors which dictate the failure location and rupture life of the joints.

引用

页码：432 / 441

页数：10

共 26 条

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