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首页> 外文期刊>Journal of Materials Engineering and Performance >Effect of Heat Treatment on Fracture Toughness of As-Forged AZ80 Magnesium Alloy
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Effect of Heat Treatment on Fracture Toughness of As-Forged AZ80 Magnesium Alloy

机译：热处理对锻造AZ80镁合金断裂韧性的影响

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摘要

The effect of heat treatment on the plane-strain fracture toughness in forged AZ80 magnesium alloy was studied. Two different kinds of heat treatment technologies (T5 and T6) were performed on the forged samples. The values of plane-strain fracture toughness (K-IC) were obtained from the stretched zone (SZ for short) analysis. The results showed that the as-forged specimen would produce a large quantity of beta-Mg17Al12 precipitates both in the interior of the grains and at grain boundaries after T5 and T6 heat treatments. The beta-Mg17Al12 displayed a precipitation strengthening. Compared with the as-forged specimen, the ultimate tensile strengths of T5 and T6 specimens were improved by 42.8 and 30 MPa, respectively. And the K-IC of T5 and T6 specimens also increased to 23.8 and 21.0 MPa m(1/2) while that of the as-forged sample was 17.9 MPa m(1/2). The average grain size of T5 sample was similar to that of the as-forged one, but was finer than that of T6 specimen. The best mechanical properties and fracture toughness of forged AZ80 magnesium alloy were achieved after T5 treatment.
机译：研究了热处理对锻造AZ80镁合金平面应变断裂韧性的影响。对锻造样品执行了两种不同的热处理技术（T5和T6）。平面应变断裂韧性（K-IC）的值是从拉伸区（简称SZ）分析获得的。结果表明，经T5和T6热处理后，锻造的试样会在晶粒内部和晶界产生大量的β-Mg17Al12沉淀。 β-Mg17Al12表现出沉淀作用。与锻造试样相比，T5和T6试样的极限抗拉强度分别提高了42.8和30 MPa。 T5和T6试样的K-IC也增加到23.8和21.0 MPa m（1/2），而锻造试样的K-IC则为17.9 MPa m（1/2）。 T5样品的平均晶粒尺寸与锻造样品的平均晶粒尺寸相似，但比T6样品的平均晶粒尺寸细。经T5处理后，AZ80镁合金的机械性能和断裂韧性达到最佳。

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