Effect of annealing process on tensile deformation behavior of the SLM AlSi10Mg alloy

doi:10.13251/j.issn.0254-6051.2024.06.004

Abstract

Abstract: With the aid of scanning electron microscope, optical microscope, tensile testing machine, effects of annealing temperature and annealing time on selective laser melted (SLM) AlSi10Mg alloy tensile deformation behavior were studied, and the regional strain under different annealing were analyzed. The results show that with the increase of annealing temperature and annealing time, the phase size of eutectic Si in the SLM AlSi10Mg alloy increases, the lap grain of the specimen gradually disappears, and the eutectic structure gradually becomes uniform and spheroidized. The plastic deformation of the alloy specimen is obvious, the large deformation area is enlarged, and the local large deformation area is necked. The tensile strength of the alloy decreases, the elongation increases and the microhardness decreases. After annealing at 500 ℃ for 1 h, the elongation of the alloy increases from 6.7% to 15.1%, and the tensile strength decreases from 252 MPa to 150 MPa. The alloy has good strength and plasticity.

Key words: AlSi10Mg alloy, selective laser melting(SLM), annealing, microstructure, mechanical properties

CLC Number:

TG146

Liu Yiran, Li Lei. Effect of annealing process on tensile deformation behavior of the SLM AlSi10Mg alloy[J]. Heat Treatment of Metals, 2024, 49(6): 23-28.

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