Home > Publications database > Effects of heat input on weld microstructure and properties in keyhole TIG welding of Invar 36 alloy > print

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100 1 _ |a Liu, Hongbing
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245 _ _ |a Effects of heat input on weld microstructure and properties in keyhole TIG welding of Invar 36 alloy
260 _ _ |a Basel
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520 _ _ |a 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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700 1 _ |a Lv, Shanhui
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700 1 _ |a Xuan, Yang
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700 1 _ |a Oliveira, João Pedro
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700 1 _ |a Schell, Norbert
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700 1 _ |a Shen, Jiajia
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700 1 _ |a Deng, Jingyu
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700 1 _ |a Wang, Yuhua
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700 1 _ |a Yang, Jin
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773 _ _ |a 10.3390/ma16103692
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