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取过滤的与未过滤的LD_5铝合金试样进行平面应变断裂韧性测试和断口扫描电镜分析。据此分析了金属夹杂物对铝合金断裂韧性的影响,并进行了定量讨论。结果表明,过滤净化可显著改善铝合金断裂韧性,在本实验条件下,使该台金的K_(1c)值提高12.7%。铝合金的断裂韧性与非金属夹杂物含量密切相关,对实验数据的回归分析袁明,该合金的K_(1c)与夹杂物的平均间距(?)的0.44次方成正比,符合理论上的推导。
The filtered and unfiltered LD_5 aluminum alloy specimens were tested for plane strain fracture toughness and fracture surface scanning electron microscopy. Based on this, the influence of metal inclusion on fracture toughness of aluminum alloy was analyzed and discussed quantitatively. The results show that filtration and purification can significantly improve the fracture toughness of the aluminum alloy. Under the experimental conditions, the K 1c value of the gold increases by 12.7%. The fracture toughness of aluminum alloy is closely related to the content of non-metallic inclusions. Regression analysis of the experimental data Yuan Ming, the K_ (1c) of this alloy is proportional to the 0.44 th power of the average spacing (?) Of the inclusions, Derived.