Characterization of Structure-Property Relationship of Incoloy 825 and SAF 2507 Dissimilar Welds

被引：19
作者：
Kangazian, Jalal [1 ]
Shamanian, Morteza [1 ]
机构：
[1] Isfahan Univ Technol, Dept Mat Engn, Esfahan 8415683111, Iran
来源：
TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS | 2018年 / 71卷 / 07期
关键词：
Tensile property; Impact toughness; Microstructure; Dissimilar welding; Ni-based alloy; DUPLEX STAINLESS-STEEL; GAS TUNGSTEN ARC; MECHANICAL-PROPERTIES; CORROSION BEHAVIOR; INCONEL; 718; MICROSTRUCTURAL CHARACTERIZATION; ALLOY; TOUGHNESS; RESISTANCE; WELDMENTS;
D O I：
10.1007/s12666-018-1309-9
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
This study was carried out to investigate the evaluation of dissimilar welding between Incoloy 825 Ni-based alloy and SAF 2507 super duplex stainless steel. Welding was conducted by pulsed current (PC) and continuous current (CC) gas tungsten arc welding (GTAW) methods using ERNiCrMo-3 filler wire. The microstructure of weld zones and base metal/weld interfaces as well as mechanical properties of weldments were characterized. The results detailed the formation of Nb, and Mo-rich phases in the inter-dendritic regions of weld metals leading to a decrease in impact resistance of weld zones in comparison to parent metals. Presence of more secondary phases at the CCGTA weld metal resulted in higher hardness and lower toughness than that of the PCGTAW sample. During tensile tests, fracture occurred at the Incoloy 825 base metal, and both weldments also underwent ductile mode of fracture. The research addressed the microstructure-property relationship for dissimilar weld joints.
引用
收藏
页码：1747 / 1757
页数：11
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