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Microstructure Analysis of TIG Welding Process for AZ31B Magnesium Alloy

Yuan Shao-qiang

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Abstract

With AZ31B magnesium alloy as the study object and optical microscope as the analytic testing device,the microstructures of butt welding joints of AZ31B magnesium alloy plate were observed and analyzed and the results show that,under the TIG welding condition,the fiber structure disappeared near the welding joints,the fine grains presented themselves in the welding joints while the grains in the heat-affected zone(HAZ)were obviously coarse.

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What this paper is about

With AZ31B magnesium alloy as the study object and optical microscope as the analytic testing device,the microstructures of butt welding joints of AZ31B magnesium alloy plate were observed and analyzed and the results show that,under the TIG welding condition,the fiber structure disappeared near the welding joints,the fine grains presented themselves in the welding joints while the grains in the heat-affected zone(HAZ)were obviously coarse.

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Available abstract

With AZ31B magnesium alloy as the study object and optical microscope as the analytic testing device,the microstructures of butt welding joints of AZ31B magnesium alloy plate were observed and analyzed and the results show that,under the TIG welding condition,the fiber structure disappeared near the welding joints,the fine grains presented themselves in the welding joints while the grains in the heat-affected zone(HAZ)were obviously coarse.

Key concepts: Welding, Materials science, Gas tungsten arc welding, Magnesium alloy, Microstructure, Metallurgy, Heat-affected zone, Optical microscope

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