Abstract
Microstructure and mechanical properties of AZ61 magnesium alloy prepared by Selective laser melting (SLM) and post-processing of the hot isostatic pressing (HIP) have been investigated. And digital image correlation (DIC) based on in-situ tensile experiments were applied. It was found that the hot isostatic pressing treatment significantly influenced the macrostructure, microstructure and tensile properties of the SLM AZ61 magnesium alloy. In particular, the disadvantages of low elongation of magnesium alloys produced by SLM were improved. The porosity decreased after HIP, and the elngation was increased by 160% without sacrificing tensile strength of SLM. The microhardness decreased slightly, and the decrease in yield strength is attributed to the growth of grain size.
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