Fe取代对高锰锰铜合金组织和性能的影响.docx

Fe 取代对高锰锰铜合金组织和性能的影响彭文屹，郭启云，覃 金，张 健，陈水发，丁俊峰(南昌大学 材料科学与工程学院，江西南昌 330031)摘要：用真空非自耗电弧炉熔炼、然后进行固溶处理制备了 Mn80 Fe 取代对高锰锰铜合金组织和性能的影响 彭文屹，郭启云，覃 金，张 健，陈水发，丁俊峰 (南昌大学 材料科学与工程学院，江西南昌 330031) 摘 要：用真空非自耗电弧炉熔炼、然后进行固溶处理制备了 Mn80Cu20－xFex(x=0, 2, 4)合金。用 X 射线衍射 分析、显微组织分析、差示扫描量热法、标准电阻应变计法等实验方法，研究了 Fe 取代对高锰 Mn-Cu 合金的 组织和磁感生应变(magnetic-field-induced strain，MFIS)的影响。研究表明，Fe 元素取代合金会发生 γ→γ’转变， 在 Mn80Cu18Fe2 和 Mn80Cu16Fe4 合金中还会有 α 相和 ε 相析出。随着 Fe 含量的增大，合金的磁性转变温度(Néel 点)呈增高的趋势，且都高于室温，在室温下呈现反铁磁性；合金的最大磁感生应变也呈增大的趋势，Mn80Cu16Fe4 合金获得的最大磁感生应变在 0.9T 时达到 9×10－5。 关键词：高锰锰铜合金；Fe 取代；磁感生应变；组织；γ→γ’转变 中图分类号：TB381; TG113 文献标识码：A 文章编号：1001-3830(2011)05-0013-04 Effects of Fe substitution on the microstructure and properties of high magnese Mn-Cu alloys PENG Wen-yi1, GUO Qi-yun, QIN Jin, ZHANG Jian, CHEN Shui-fa, DING Jun-feng School of Materials Science and Engineering, Nanchang University, Nanchang 330031, China Abstract：Mn80Cu20－xFex(x=0, 2, 4) alloys were prepared using non-consumble vacuum arc furnace smelting followed by subsequently solution treatment. The effect of Fe content on the microstructure and magnetic-field-induced strain(MFIS) was studied by means of X-ray diffraction (XRD), photomicrograph, differential scanning calorimetry (DSC), and resistance strain gauge method. The result showed that FCC→FCT martensitic transition occurs in Fe-substituted MnCu alloys, and α- and ε-phase appeared in Mn80Cu18Fe2 alloy and Mn80Cu16Fe4 alloy. With the increase of Fe content, the Néel temperatures of alloys increases, which are all higher than room temperature, that’s to say, the alloys exhibit antiferromagnetic austenite microstructure at room temperature after quenching from high temperature. Alloys possess much larger magnetic-field-induced strain (MFIS) with the increase of Fe content, and taking Mn80Cu16Fe4 alloy as an example, when magnetic field strength was 0.9 T, the MFIS was at its maximum, 9×10－5. Key words: high manganese Mn-Cu alloy; Fe-substitution; MFIS; microstructure; γ