TY  - JOUR
AU  - Liu, Hongbing
AU  - Lv, Shanhui
AU  - Xuan, Yang
AU  - Oliveira, João Pedro
AU  - Schell, Norbert
AU  - Shen, Jiajia
AU  - Deng, Jingyu
AU  - Wang, Yuhua
AU  - Yang, Jin
TI  - Effects of heat input on weld microstructure and properties in keyhole TIG welding of Invar 36 alloy
JO  - Materials
VL  - 16
IS  - 10
SN  - 1996-1944
CY  - Basel
PB  - MDPI
M1  - PUBDB-2023-03150
SP  - 3692
PY  - 2023
AB  - The Invar alloy is widely used for aircraft wing mould manufacturing. In this work,keyhole-tungsten inert gas (K-TIG) butt welding was used to join 10 mm thick Invar 36 alloy plates.The effect of heat input on the microstructure, morphology and mechanical properties was studiedby using scanning electron microscopy, high energy synchrotron X-ray diffraction, microhardnessmapping, tensile and impact testing. It was shown that regardless of the selected heat input, thematerial was solely composed of austenite, although the grain size changed significantly. Thechange in heat input also led to texture changes in the fusion zone, as qualitatively determinedwith synchrotron radiation. With increases in heat input, the impact properties of the welded jointsdecreased. The coefficient of thermal expansion of the joints was measured, which demonstrated thatthe current process is suitable for aerospace applications.
LB  - PUB:(DE-HGF)16
C6  - 37241319
UR  - <Go to ISI:>//WOS:000998086400001
DO  - DOI:10.3390/ma16103692
UR  - https://bib-pubdb1.desy.de/record/584599
ER  -