Characterization of Friction Stir and TIG Welded CK45 Carbon Steel

被引：3

作者：

Rafati, Mohammadreza ^{[1
]}

Mostafapour, Amir ^{[1
]}

Laieghi, Hossein ^{[1
]}

Somani, Mahesh Chandra ^{[2
]}

Komi, Jukka ^{[2
]}

机构：

[1] Univ Tabriz, Fac Mech Engn, POB 51666-16471, Tabriz, Iran

[2] Univ Oulu, Ctr Adv Steels Res, POB 4200, Oulu 90014, Finland

来源：

MATERIALS | 2021年 / 14卷 / 15期

基金：

芬兰科学院;

关键词：

carbon steel; macrostructure; microstructure; mechanical properties; friction stir welding (FSW); tungsten inert gas (TIG) welding; MECHANICAL-PROPERTIES; WELDABILITY;

D O I：

10.3390/ma14154098

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The present paper aims to compare the microstructural and mechanical properties of CK45 carbon steel plates, joined by friction stir (FSW) and tungsten inert gas (TIG) welding methods. Besides visual inspection, the welded joints and the base material were subsequently evaluated in respect of optical microstructures, hardness and tensile properties. Sound joints could be accomplished using both the FSW and TIG welding methods through proper selection of process parameters and the filler metal. The influence of a water-cooling system on the FSW and various filler metals on the quality of TIG welding were further assessed. Both the FS welded sample as well as TIG welded samples with two different filler metals ER70S-6 and ER80S-B2 exhibited brittle behavior that could be mitigated through optimized water cooling and use of R60 filler metal. A drastic reduction of brittle martensite phase constituent in the microstructure corroborated significant improvements in mechanical properties of the welded zones for both the FSW sample as well as TIG welded samples with R60 filler metal.

引用

页数：11

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