Journal Article

PUBDB-2023-03150

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Effects of heat input on weld microstructure and properties in keyhole TIG welding of Invar 36 alloy

Liu, H. ; Lv, S. ; Xuan, Y. ; Oliveira, J. P.Extern* ; Schell, N.HZG*Hereon* ; Shen, J.Extern* ; Deng, J. ; Wang, Y. ; Yang, J. (Corresponding author)Extern*

2023
MDPI Basel

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Please use a persistent id in citations: doi:10.3390/ma16103692  doi:10.3204/PUBDB-2023-03150

Abstract: 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.

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Contributing Institute(s):

1. DOOR-User (DOOR ; HAS-User)
2. Helmholtz-Zentrum Hereon (Hereon)

Research Program(s):

1. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)
2. FS-Proposal: I-20210899 EC (I-20210899-EC) (I-20210899-EC)
3. CALIPSOplus - Convenient Access to Light Sources Open to Innovation, Science and to the World (730872) (730872)

Experiment(s):

1. PETRA Beamline P07 (PETRA III)

Appears in the scientific report 2023

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Database coverage:
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