摘要
在Ti_(40)Zr_(10)Cu_(36)Pd_(14)非晶合金基体中微添加β-Ti相稳定化元素Mo,使体系在凝固过程中原位析出塑性β-Ti相,制备出原位自生β-Ti相增强Ti基非晶复合材料。在这种复合材料的变形过程中塑性β-Ti相阻碍基体中主剪切带的扩展,使其发生偏转和增殖生成多重剪切带,使其室温力学性能显著提高。其中(Ti_(0.4)Zr_(0.1)Cu_(0.36)Pd_(0.14))_(95)Mo_(5)试样的室温强度达到2630 MPa,塑性应变达到7.3%,比基体分别提高了32.0%和508%。
Ti-based amorphous alloys possess excellent properties such as low density,good biocompatibility and high corrosion resistance,which makes them one kind of promising materials used as biomedical materials.However,the room-temperature brittleness of Ti-based amorphous alloys limits their application.In order to improve the room-temperature plasticity of Ti-based amorphous alloys,the present study,a small amount of Mo(a β-Ti stabilizing element)is added to the Ti_(40)Zr_(10)Cu_(36)Pd_(14) amorphous alloy so that the plastic β-Ti phase particles may be precipitated in-situ within the alloy during the solidification process.It is expected that in the subsequent deformation process,the plastic β-Ti phase can effectively impede the rapid propagation of the main shear band in the matrix,causing deflects,branching or multiplication of it.The multiple shear bands significantly improved the room-temperature mechanical properties.Finally,the optimal room-temperature mechanical properties were obtained for the amorphous alloy(Ti_(0.4)Zr_(0.1)Cu_(0.36)Pd_(0.14))_(95)Mo_(5) which showed the fracture strength of 2630 MPa and plastic strain of 7.3%,namely 32.0% and 508% higher than that of the base alloy,respectively.
作者
余圣
郭威
吕书林
吴树森
YU Sheng;GUO Wei;LV Shulin;WU Shusen(State Key Laboratory of Material Processing and Die&Mould Technology,School of Materials Science and Engineering,Huazhong University of Science and Technology,Wuhan 430074,China;Research Institute of Huazhong University of Science and Technology in Shenzhen,Shenzhen 518057,China;State Key Laboratory for Mechanical Behavior of Materials,Xi'an Jiaotong University,Xi'an 710049,China)
出处
《材料研究学报》
EI
CAS
CSCD
北大核心
2024年第2期105-110,共6页
Chinese Journal of Materials Research
基金
国家自然科学基金(52101138)
深圳市科技计划(JCYJ20220530160813032)
新金属材料国家重点实验室开放基金(2020-Z01)
金属材料强度国家重点实验室开放基金(20202205)
广东省基础与应用基础研究基金(2020A1515110531)。
关键词
金属材料
非晶复合材料
室温塑性
剪切带
metallic materials
amorphous alloy matrix composites
room-temperature plasticity
shear band
