Supervisor:
Southwest Ordnance Industry Bureau
Organizer:
Chongqing Ordnance Industry Society
Chongqing University of Technology
Chongqing University of Technology
Effects of heat treatment processing on microstructure evolution and microhardness of deformed Mg Gd Y Zn Zr Alloys
| DOI: | 10.11809/bqzbgcxb2023.10.011 |
| Keywords: | Mg Gd Y Zn Zr alloy; solution treatment; aging treatment; microstructure; microhardness |
| Abstract: | Heat treatment is an effective way to improve the comprehensive mechanical properties of deformed rare earth magnesium (Mg) alloys, and a key problem to be solved is finding out the reasonable process parameters and research the evolution of microstructure and mechanical properties.In this paper, the effects of solution and aging treatment on microstructure and microhardness of Mg Gd Y Zn Zr alloys are studied.The results shows that the as received alloy is mainly composed of α Mg matrix, broken block shaped 14H LPSO phases and β Mg5(Gd, Y, Zn) phases.After solution treatment, the block shaped LPSO phases are dissolved in the matrix with the reduced volume fraction, and the lamellar LPSO phases are precipitated.The optimal solution treatment parameter is 520 ℃×16 h, the microhardness of the alloy is 94.50 HV.After aging treatment at 200 ℃×32 h, the microhardness of the alloy is 120.35 HV, the under aging precipitation phase is β″, the peak aging precipitation phase is β′, and the over aging precipitation phase is β Mg5(Gd,Y,Zn). |
| Issue: | Vol. 44 No. 10 (2023) |
| Published: | 2023-10-28 |
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