本文按ASTM E399-78规定,用不同厚度(B=20—120mm)的紧凑拉伸试件来测试铸镁合金ZM5的断裂韧性值。从实验结果出发,建议将铸镁合金的P_(max)/P_Q由≤1.1放宽至≤1.6。
Fracture toughness was determined for various thickness, B=20—120mm, of compact tension specimens of a cast Mg alloy ZM5 according to ASTM E399—78. A proposal could be thus made to the relaxation of P_(max)/P_Q from≤1.1 to ≤1.6 for this alloy.
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