快速凝固Cu-Zr-Al合金的马氏体相变  

Study of Martensitic Transformation in Rapidly Solidified Cu-Zr-Al Alloys

作　　者：曲洋 邹继鹏 马理 覃作祥[1] QU Yang;ZOU Jipeng;MA Li;QIN Zuoxiang(School of Materials Science and Engineering,Dalian Jiaotong University,Dalian 116028,China)

机构地区：[1]大连交通大学材料科学与工程学院,辽宁大连116028

出　　处：《大连交通大学学报》2018年第2期79-84,共6页Journal of Dalian Jiaotong University

摘　　要：通过快速凝固法制备Cu-Zr-Al合金试样,利用电阻法测定合金的马氏体相变温度,探索Al含量、结晶状态等对马氏体相变的影响.研究表明,吸铸速凝制备的Cu-Zr-Al合金样品晶格完整性差或存在少量非晶.在Cu-Zr合金中加入Al元素,会促进B2相的形成,且含量越高,作用越显著.在Cu-Zr-Al合金中,吸铸速凝态样品较晶化快冷态的马氏体相变温度低,吸铸速凝形成的非晶将抑制马氏体相变的发生,且增大马氏体相变的热滞后.随着Al含量的增加,马氏体相变温度逐渐降低,Al的加入也抑制马氏体相变.但增加Al含量,马氏体相变的热滞后会逐渐减小,使相变类型由非热弹性马氏体相变向热弹性马氏体相变进行转变.Cu-Zr-Al alloy specimens were prepared by rapid solidification method.The martensitic transformation temperature of the alloys were measured by four-probe resistance method,and the influence of Al content and crystallization state on the martensitic transformation was investigated.The results show that the lattice integrity of Cu-Zr-Al alloy samples prepared by casting is poor or a small amount of amorphous phase exists.The addition of Al in Cu-Zr alloy promotes the formation of B2 phase,and the higher the Al content,the more remarkable the effect is.In Cu-Zr-Al alloy,the martensitic transformation temperature of the cast rapidly solidified sample is lower than that of the annealed one followed by rapid cooling.The amorphous phase formed by the absorption casting will control the occurrence of martensitic transformation and increase the thermal hysteresis of the martensitic transformation.With the increase of Al content,the martensitic transformation temperature is decreased gradually,and the addition of Al also inhibits martensitic transformation.However,with increasing Al content,the thermal hysteresis of martensitic transformation is decreased gradually,and the phase transition changes from non thermal elastic martensitic transformation to thermoelastic martensitic transformation.

关 键 词：Zr-Cu-Al合金 马氏体相变 四端电位法 非热弹性马氏体 

分 类 号：TG146.11[一般工业技术—材料科学与工程]