期刊
MATERIALS
卷 12, 期 7, 页码 -出版社
MDPI
DOI: 10.3390/ma12071100
关键词
AM50; Boron; grain refinement; mechanical properties
类别
资金
- National Science Foundation for Young Scientists of China [51701027]
- National Key Research, and Development Program of China [2016YFB0301100]
- Fundamental Research Funds for the Central Universities Project [2019CDXYCL0031]
The effect of B addition on the microstructure and mechanical properties of AM50 was investigated, and the mechanism of grain refinement was clarified. Optical microscopy, X-ray diffraction, scanning electron microscopy, and electron probe microanalysis were used to characterize the microstructure evolution. The grain size of as-cast AM50 decreased from 550 m to 100 m with the B content increasing from 0 to 0.15 wt.%. AlB2 particles in the Al-3B master alloy transformed to Mg-B, and acted as the grain refiner. The addition of B to as cast AM50 alloy results in improved mechanical properties of AM50 + xB alloys. For instance, the YTS (yield tensile strength), UTS (ultimate tensile strength), and elongation of as cast AM50 + 0.15 wt.% B alloy was 94 MPa, 215 MPa, and 12.3%.
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