scholarly journals Performance Evaluation of Reworked Weld Joints

Author(s):  
Sivarao ◽  
Aidy Ali ◽  
Mohd Amran ◽  
L.D. Sivakumar ◽  
Shukor Salleh ◽  
...  

This study presents the performance evaluation of reworked welded joint that have weld imperfections which may result the strength of the structures. Tensile, bending and shear tests have been performed to evaluate the performance and reliability of reworked joint. Their effects on the quality and performance of the reworked welded joint are depend on the requirements of the structure in use. This study is providing detailed examination of the mechanical properties of the carbon steel reworked welded joint by using shielded metal arc welding (SMAW) techniques.

2010 ◽  
Vol 139-141 ◽  
pp. 352-355 ◽  
Author(s):  
Tian Hui Zhang ◽  
Hong Cai Fu ◽  
Pei Jun Yan ◽  
Fang Wei Jin ◽  
Qiong Wang

Weldability analysis, metallographic experiments and mechanical property experiments were carried out on weld joint between B610CF and 16MnR steel using shielded metal arc welding method and mixed active-gas arc welding method. Weldability analysis shows that the weld joint has some tendency to cold crack, and preheat is needed before welding. Metallographic results show that there are ferrite and bainite in weld metal, and in heat-affected zone of B610CF side there are ferrite and bainite, on which there is much dispersed slight Fe3C, and in heat-affected zone of 16MnR side there are ferrite, pearlite. There is no quenching microstructure resulting in crack in weld joint. From mechanical property results, it can be concluded that the weld joints have excellent impact toughness at low temperature and the tensile strength and plasticity of weld joints is matched to the ones of 16MnR steel. So the welding parameters in this paper are appropriate to get qualified weld joints.


Author(s):  
Kun Yu ◽  
Zhenguo Jiang ◽  
Xianwu Shi ◽  
Chaowen Li ◽  
Shuangjian Chen ◽  
...  

UNS N10003 alloy is a primary material of the Thorium Molten Salt Reactor (TMSR) in China that is a suitable candidate reactor of the Generation IV nuclear reactors. Gas metal arc welding (GMAW) is more effective than gas tungsten arc welding (GTAW) which is usually used to weld nickel-base alloys. In order to improve welding efficiency, it is necessary to weld nickel-base alloys using GMAW. The purpose of this work is to evaluate effect of GMAW on microstructure evolution and mechanical properties in UNS N10003 alloy. The results of microstructure showed that the sound welded joint without hot cracking can be obtained, although quantities of M6C-γ eutectic phases with large size were precipitated in fusion zone (FZ) and transformed in heat affected zone (HAZ) because of element segregation. The results of microhardness test indicated that there was no softened zone in the welded joint. The results of tensile test at room temperature and high temperature showed that the short-term time-independent strength was not damaged by the formation of large M6C-γ eutectic phases.


2018 ◽  
Vol 5 (10) ◽  
pp. 106506 ◽  
Author(s):  
Tushar Ramdas Dandekar ◽  
Aman Gupta ◽  
Amit Kumar ◽  
Rajesh Kisni Khatirkar ◽  
Basavaraj Vadavadagi

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