Laser & Optoelectronics Progress, Volume. 57, Issue 23, 231408(2020)
Research on High Cycle Fatigue Performance of AlSi7Mg Alloy Fabricated by Selective Laser Melting
Figures & Tables(8)
Fig. 3. OM image of microstructure of as-built AlSi7Mg alloy formed by SLM. (a) Horizontal cross section; (b) vertical cross section
Fig. 4. SEM image of the cross-section overlap of as-built microstructure of the AlSi7Mg alloy formed by SLM
Fig. 6. Fatigue fracture diagrams of AlSi7Mg alloy under different stress amplitudes. (a) 120MPa; (b) 150MPa; (c) 180MPa; (d) 200MPa
Table 1. Chemical composition of the AlSi7Mg alloy powders (mass fraction, %)
View tableTable 1. Chemical composition of the AlSi7Mg alloy powders (mass fraction, %)
Sample Si Mg Fe Cu Zn Ti Mn Al Norm value 6.5-7.5 0.45-0.7 ≤0.19 ≤0.05 ≤0.07 0.08-0.25 ≤0.10 Bal. Actual value 7.01 0.617 0.141 0.01 <0.009 0.089 <0.003 Bal.
Table 2. Comparison of tensile properties of cast and SLM formed AlSi7Mg and AlSi10Mg alloys
View tableTable 2. Comparison of tensile properties of cast and SLM formed AlSi7Mg and AlSi10Mg alloys
Specimen Tensile strength/MPa Yield strength/MPa Ductility/% Cast AlSi7Mg 275.00 185.00 5.00 SLM AlSi7Mg(as-built specimens) 435.78 299.23 14.36 Cast AlSi10Mg 315.00 165.00 5.00 SLM AlSi10Mg(as-built specimens) 477.50 319.00 4.00
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Tianchun Zou, Minying Chen, He Zhu, Yao Ou. Research on High Cycle Fatigue Performance of AlSi7Mg Alloy Fabricated by Selective Laser Melting[J]. Laser & Optoelectronics Progress, 2020, 57(23): 231408
Paper Information
Category: Lasers and Laser Optics
Received: Feb. 17, 2020
Accepted: Apr. 17, 2020
Published Online: Nov. 26, 2020
The Author Email: Minying Chen (chenminying292@163.com)
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