Effect of filler wires and direct ageing on the microstructure and mechanical properties in the multi-pass welding of Inconel 718

被引：53
|
作者：
Ramkumar, K. Devendranath [1 ]
Sai, R. Jagat [1 ]
Reddy, V. Santhosh [1 ]
Gundla, Sridhar [1 ]
Mohan, T. Harsha [1 ]
Saxena, Vimal [1 ]
Arivazhagan, N. [1 ]
机构：
[1] VIT Univ, Sch Mech & Bldg Sci, Vellore, Tamil Nadu, India
来源：
JOURNAL OF MANUFACTURING PROCESSES | 2015年 / 18卷
关键词：
Inconel; 718; Pulsed current gas tungsten arc welding; Microstructure; Mechanical characterization; Direct ageing heat treatment; LAVES PHASE;
D O I：
10.1016/j.jmapro.2015.01.001
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
This paper investigates the weldability, microstructure and mechanical properties of 5 mm thick Inconel 718 plates obtained by pulsed current gas tungsten arc welding (PCGTAW) using ERNiCu-7, ERNiCrCoMo-1 and ERNiCr-3 fillers. Post weld heat treatment (PWHT) was also carried out at 720 degrees C/8 h/furnace cooling followed by 620 degrees C/8 h/air cooling on the weldments. A comparative evaluation based on the microstructure features and mechanical properties of both the as-welded and aged samples were studied. Further this study addressed the combined effect of filler wires and post weld heat treatment on the metallurgical and mechanical properties of the weldments. The studies showed the improvement in tensile strength and drop in impact toughness for all the weldments after direct ageing heat treatment. (C) 2015 The Society of Manufacturing Engineers. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：23 / 45
页数：23
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