【摘要】 应用功率超声-电磁复合场来改善CuAlMn形状记忆合金的组织和性能。使用扫描电子显微镜、光学显微镜和力学性能测试技术研究了功率超声-电磁复合场对CuAlMn形状记忆合金组织和性能的影响。结果表明:在CuAlMn形状记忆合金凝固过程中施加600 W功率超声-90 A电磁复合场,可以得到最佳的晶粒细化效果,使CuAlMn形状记忆合金铸锭的晶粒组织从1.62 mm细化至0.41 mm;相应地,CuAlMn形状记忆合金的力学性能得到大幅提高,其中抗拉强度和伸长率分别提高到674 MPa和18.2%。更多还原

【Abstract】 Compound field(combination of power ultrasonic field and rotating electromagnetic field) was used to improve the solidification structure and mechanical properties of CuAlMn shape memory alloy. The effects of compound field on the solidification structure and mechanical properties of CuAlMn shape memory alloy were studied by using SEM, OM and electronic universal tester. The results show that the grain refinement effect of the CuAlMn shape memory alloy ingot is the best when the intensity of ultrasonic field is 600 W and the intensity of electromagnetic field is 90 A, and the grain size is decreased from 1.62 mm to 0.41 mm. Accordingly, the tensile properties are significantly improved, and the values of tensile strength and elongation are 674 MPa and 18.2%, respectively.更多还原