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通过复合添加Al4C3和合金化元素Ce来改善ZM5镁合金的组织和力学性能。结果表明,Al4C3和Ce的添加使得ZM5合金的组织显著细化,Al4C3和Ce的复合添加产生新相Al4Ce。由DTA分析可知,Al4C3与Ce的添加,使得ZM5合金在较小的过冷度下就能得到细晶组织。拉伸试验测试结果表明,在T6条件下,Al4C3和Ce的添加能显著提高ZM5合金的抗拉强度,延伸率虽有提高,但其绝对值偏低。Al4C3和Ce的添加使得ZM5合金的断裂机制从解理断裂变为准解理断裂。
The microstructure and mechanical properties of ZM5 magnesium alloy were improved by adding Al4C3 and alloying element Ce. The results show that the addition of Al4C3 and Ce results in the refinement of the microstructure of the ZM5 alloy and the addition of Al4C3 and Ce to the new phase Al4Ce. DTA analysis shows that the addition of Al4C3 and Ce makes the ZM5 alloy get fine grain structure under a little undercooling. Tensile test results show that, in the T6 conditions, Al4C3 and Ce addition can significantly improve the tensile strength of ZM5 alloy, although the elongation increased, but its absolute value is low. The addition of Al4C3 and Ce changed the fracture mechanism of ZM5 alloy from cleavage fracture to quasi-cleavage fracture.