J. Mater. Sci. Technol. ›› 2018, Vol. 34 ›› Issue (7): 1222-1228.DOI: 10.1016/j.jmst.2017.06.011
Special Issue: Aluminum Alloys-2018
• Orginal Article • Previous Articles Next Articles
Lijie Zuoa, Bing Yea(), Jian Fenga, Xiangyang Kongb, Haiyan Jianga, Wenjiang Dinga
Received:
2017-03-21
Accepted:
2017-06-12
Online:
2018-07-10
Published:
2018-07-22
Lijie Zuo, Bing Ye, Jian Feng, Xiangyang Kong, Haiyan Jiang, Wenjiang Ding. Microstructure, tensile properties and creep behavior of Al-12Si-3.5Cu-2Ni-0.8Mg alloy produced by different casting technologies[J]. J. Mater. Sci. Technol., 2018, 34(7): 1222-1228.
Alloy | Room temperature | 350 °C | ||||
---|---|---|---|---|---|---|
UTS (MPa) | YS (MPa) | δ (%) | UTS (MPa) | YS (MPa) | δ (%) | |
PMC | 244 | 221 | 0.69 | 101 | 81 | 4.3 |
HPDC | 310 | 282 | 0.35 | 135 | 103 | 5.6 |
Table 1 Tensile properties of Al-12Si-3.5Cu-2Ni-0.8Mg alloy produced by permanent mold casting (PMC) and high pressure die casting (HPDC) at room temperature and 350 °C (YS: yield strength, δ: elongation).
Alloy | Room temperature | 350 °C | ||||
---|---|---|---|---|---|---|
UTS (MPa) | YS (MPa) | δ (%) | UTS (MPa) | YS (MPa) | δ (%) | |
PMC | 244 | 221 | 0.69 | 101 | 81 | 4.3 |
HPDC | 310 | 282 | 0.35 | 135 | 103 | 5.6 |
Fig. 5. SEM images of tensile fracture surfaces for PMC (a, b) and HPDC (c, d) alloys at low (a, c) and high (b, d) magnification at room temperature.
Fig. 8. The minimum creep rate of studied alloys measured from creep tests at 250 °C and stress varied from 20 MPa to 130 MPa (a) and 80 MPa and temperature varied from 200 °C to 300 °C (b).
Fig. 9. (a) The minimum creep rate versus applied stress plotted on double logarithmic axes for the studied alloys at 250 °C and (b) Arrhenius plot of the minimum creep rate versus 1000/(RT) on log-linear axes at 80 MPa.
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