Al-9.0%Si-4.0%Cu-0.4%Mg(-0.3%Sc)合金的显微组织及其低周疲劳行为*

车欣, 梁兴奎, 陈丽丽, 陈立佳, 李锋

MICROSTRUCTURES AND LOW-CYCLE FATIGUE BEHAVIOR OF Al-9.0%Si-4.0%Cu-0.4%Mg(-0.3%Sc) ALLOY

CHE Xin, LIANG Xingkui, CHEN Lili, CHEN Lijia, LI Feng

表1 T6态Al-9.0%Si-4.0%Cu-0.4%Mg(-0.3%Sc)合金的应变疲劳参数

Table 1 Strain fatigue parameters of Al-9.0%Si-4.0%Cu-0.4%Mg(-0.3%Sc) alloys subjected to T6 treatment

Alloy? sf' / MPa b ef' / % c K' / MPa n' ?Remark Al-Si-Cu-Mg 394.74 -0.0822 2.8 -0.6594 333.93 0.0333 Det/2≥0.35% 1908.7 -1.5412 Det/2≤0.35% Al-Si-Cu-Mg-Sc 365.14 -0.0671 8.7 -0.4892 438.58 0.0416 Det/2≥0.35% 699519 -2.1887 Det/2≤0.35%