时效对Mn70Fe25Cu5合金组织和磁诱发应变性能的影响
Effect of aging on the microstructure and magnetic-field-induced strain of Mn70Fe25Cu5 alloy
彭文屹，张健，郭启云，陈水发
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作者单位：南昌大学 材料科学与工程学院
中文关键字：γ-MnFe；时效；显微组织；磁诱发应变
英文关键字：γ-MnFe;aging; microstructure; magnetic-field-induced strain
中文摘要：采用XRD、显微观察、差示扫描量热法、标准电阻应变计法等，研究了时效处理对Mn70Fe25Cu5合金的组织和磁诱发应变的影响。结果表明，在450℃时效时，合金结构和磁诱发应变性能发生轻微变化。当时效温度达到500℃，合金中会析出大量的α-Mn相，α相会使得磁诱发应变性能降低。
英文摘要：Effect of aging on the microstructure and magnetic-field-induced strain(MFIS) in Mn70Fe25Cu5 alloy was investigated by means of XRD, photomicrograph, DSC, resistance strain gauge method. As a result, the structure and MFIS of Mn70Fe25Cu5 alloy revealed that there were small changes after aging at 450℃。But when aging at 500℃, there was a large number of α-Mn phase separating out，which degrading the MFIS of alloy.