【作者】 张骥华； 邓华铭； 陈树川； 徐祖耀；

【Author】 ZHANG Ji-hua;DENG Hua-ming;CHEN Shu-cuan;Xu Zu-yao The School of Materials, Shanghai Jiaotong University, Shanghai, 200030, China

【机构】 上海交通大学材料学院；

【摘要】 孪晶型阻尼材料已被实际应用,孪晶通过fcc-fct 马氏体相变形成,而γMn基合金中,马氏体相变又与合金的反铁磁转变密切相关。本文通对Mn-Fe和Mn-Ni 合金的内耗和模量的测量,研究这两类相变在不同材料,不同成分合金中的耦合的机制,以及反铁磁转变和马氏体相变对孪晶形成的作用,结果显示,马氏体相变和反铁磁转变耦合或马氏体相变与孪晶阻尼峰耦合都可以获得材料的高阻尼性能。更多还原

【Abstract】 The twin-typed materials was practically used. In general the twin is formed with fcc-fct martensitictransformation. But in γ Mn-based alloys, marternsitic transformation is closely associated with antiferromagnetictransition. The paper attempts to investigate the coupling mechanism of two kinds of transformation for differentmaterials and different composition in an alloy by the use of internal friction and modulus measurement for Mn-Fe andMn-Ni alloys and the effect of antiferromagnetic transition and martensitic transformation on the twin formation. Theresults show that the high damping of γMn based alloys will be obtained through the coupling betweenantiferromagnetic transition and manensitic transformation or between martensitic transformation and twin damping.更多还原