TiZrHfCuBe高熵非晶合金室温压痕蠕变行为  

Room temperature indentation creep behavior of TiZrHfCuBe high-entropy metallic glass

作　　者：王一凡 谢心怡 郝钰宁 安阳 李炎森 WANG Yifan;XIE Xinyi;HAO Yuning;AN Yang;LI Yansen(Department of Engineering Mechanics,Shijiazhuang Tiedao University,Shijiazhuang 050043,Hebei,China;Hebei Research Center of the Basic Discipline Engineering Mechanics,Shijiazhuang Tiedao University,Shijiazhuang 050043,Hebei,China;Provincial Collaborative Innovation Center of Mechanics of Intelligent Materials in Hebei,Shijiazhuang Tiedao University,Shijiazhuang 050043,Hebei,China)

机构地区：[1]石家庄铁道大学工程力学系,河北石家庄050043 [2]石家庄铁道大学河北省工程力学基础学科研究中心,河北石家庄050043 [3]石家庄铁道大学河北省智能材料力学协同创新中心,河北石家庄050043

出　　处：《金属功能材料》2025年第1期82-86,共5页Metallic Functional Materials

基　　金：大学生创新创业训练计划(S202310107093)。

摘　　要：利用纳米压痕技术研究了TiZrHfCuBe高熵非晶合金在不同加载速率和峰值载荷下的蠕变行为,研究结果表明:该合金在保载阶段和卸载阶段均产生蠕变位移,且加载速率越大,蠕变位移越小,峰值载荷越大,蠕变位移越大;该合金的应变率随时间增加,先迅速下降,且加载速率越小下降越快,后逐渐达到稳定状态,最终所有曲线逐渐趋于0.0094;加载速率和峰值载荷越大,合金蠕变应力指数也越大,说明加载速率和峰值载荷较高时,样品的蠕变抗力越高,蠕变性能更好,但是加载速率对蠕变应力指数的影响相较于峰值载荷更为明显。Department of Engineering Mechanics,Shijiazhuang Tiedao University;Hebei Research Center of the Basic Discipline Engineering Mechanics,Shijiazhuang Tiedao University;Provincial Collaborative Innovation Center of Mechanics of Intelligent Materials in Hebei,Shijiazhuang Tiedao University;The creep behaviour of TiZrHfCuBe high-entropy metallic glass under different loading rates and peak loads was investigated by using nanoindentation technique.The results indicate that the alloy produces creep displacement during both load-holding and unloading stages,the higher the loading rate,the smaller the creep displacement,and the larger the peak load is,the larger the creep displacement.the strain rate of the alloy increases with time,and it firstly decreases quickly,the smaller the loading rate,the faster the decline;eventually,all the curves gradually converge to 0.0094.the higher the loading rate and peak load,the higher the creep stress index of the alloy,indicating that the higher the creep resistance of the sample,the better the creep performance,but the effect of loading rate on the creep stress index is more obvious compared to the peak load.

关 键 词：高熵非晶合金 纳米压痕 蠕变行为 应力指数 

分 类 号：TG139.8[一般工业技术—材料科学与工程]