Fe微合金化对Cu‒Zr‒Al非晶合金塑性变形行为的影响及其机理  

Effect of Fe Microalloying on Plastic Deformation Behavior of Cu-Zr-Al Metallic Glasses

作　　者：邢栋 陈双双 宋佩頔 齐凯 尹俊 李维火[1,2] XING Dong;CHEN Shuangshuang;SONG Peidi;QI Kai;YIN Jun;LIWeihuo(School of Materials Science and Engineering,Anhui University of Technology,Ma'anshan 243002,China;Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials,Anhui University of Technology,Ministry of Education,Ma'anshan 243002,China)

机构地区：[1]安徽工业大学材料科学与工程学院,马鞍山243002 [2]安徽工业大学教育部先进金属材料绿色制造与表面技术重点实验室,马鞍山243002

出　　处：《材料研究学报》2021年第11期850-856,共7页Chinese Journal of Materials Research

基　　金：安徽省自然科学基金(1908085ME147);安徽省重点研究国际合作专项(202004b11020010);安徽省高校科学研究项目(KJ2020A0262)。

摘　　要：用铜模喷铸法制备Cu_(47.8-x)Zr_(46.2)Al_(6)Fe_(x)(x=0,0.8,1.2,1.6)系列合金,研究了Fe微合金化对其非晶形成能力和力学性能的影响。结果表明:随着微量元素Fe含量的提高合金的玻璃形成能力降低,而其室温塑性变形能力明显提高;随着Fe含量的提高基体中产生了更多的自由体积,且Fe与Cu的正混合焓使基体中成分/自由体积分布的不均匀性提高。这些因素,使高Fe含量的非晶合金具有更高的塑性变形能力。Cu_(47.8-x)Zr_(46.2)Al_(6)Fe_(x)(x=0,0.8,1.2,1.6)alloy were prepared by copper-mold injection casting method and the effect of Fe microalloying on the glass-forming ability and mechanical properties of Cu_(47.8-x)Zr_(46.2)Al_(6)Fe_(x)(x=0,0.8,1.2,1.6)metallic glasses were investigated.The results show that the glassforming ability of the alloy decreases with increasing of Fe content,while the plastic deformation ability at room temperature increases obviously.It is found that with the increase of minor Fe content more free volume will be introduced into the glassy matrix,and the inhomogeneity of composition and free volume distribution in the matrix will increase as a result of the positive mixing enthalpy of Fe and Cu.These factors jointly result in enhanced plasticity of metallic glass with high Fe content.

关 键 词：金属材料 块体非晶合金 玻璃形成能力 混合焓 室温塑性 自由体积 

分 类 号：TB331[一般工业技术—材料科学与工程]