Liquation cracking in fiber laser welded joints of inconel 617

被引：48

作者：

Ren, Wenjie ^{[2
]}

Lu, Fenggui ^{[2
]}

Yang, Renjie ^{[3
]}

Liu, Xia ^{[4
]}

Li, Zhuguo ^{[1
,2
]}

机构：

[1] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, Shanghai Key Lab Mat Laser Proc & Modificat, Shanghai 200240, Peoples R China

[2] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, Shanghai Key Lab Mat Laser Proc & Modificat, Shanghai 200240, Peoples R China

[3] Shanghai Turbine Works Co, Shanghai 200240, Peoples R China

[4] Shanghai Elect Power Generat Equipment Co Ltd, Shanghai Turbine Plant, Shanghai 200240, Peoples R China

来源：

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY | 2015年 / 226卷

关键词：

Inconel; 617; Liquation cracking; Fiber laser welding; Preheating; AFFECTED ZONE CRACKING; HEAT INPUT; SUPERALLOY; HAZ; MIGRATION; FILM;

D O I：

10.1016/j.jmatprotec.2015.07.004

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Liquation cracking in the fiber laser welding Inconel 617 joint under different heat input and preheating conditions was systemically investigated. Liquation cracking is prevalent in the necking region of the welded fusion zone. The liquation of the grain boundaries (GBs) is mainly caused by the constitutional liquation of M-23(C,B)(6) carbides. The continuous (Cr, Mo)-rich phase is re-solidified due to the continuous liquid film along GBs during the solidification. The continuous (Cr, Mo)-rich phase decreases as the heat input and preheating temperature increases. The presence of the GB resolidified phase around liquation cracking is one of the features in the formation of liquation cracking. As well as, liquation cracking in heat affected zone (HAZ) would also decrease with increasing heat input and preheating temperature in the fiber laser welding of Inconel 617. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：214 / 220

页数：7

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