脉冲磁场对TC4合金时效过程中析出相的影响  

Effect of Pulsed Magnetic Field on Precipitated Phase in Aging Process of TC4 Alloy

作　　者：孙中豪 邢淑清[1] 贺帅 程桥 麻永林[1] 贺骁勇 Sun Zhonghao;Xing Shuqing;He Shuai;Cheng Qiao;Ma Yonglin;He Xiaoyong(School of Materials and Metallurgy,Inner Mongolia University of Science and Technology,Baotou 014010,China)

机构地区：[1]内蒙古科技大学材料与冶金学院,内蒙古包头014010

出　　处：《稀有金属材料与工程》2022年第1期273-279,共7页Rare Metal Materials and Engineering

基　　金：内蒙古自治区自然科学基金(2018MS05008,2020MS05046)。

摘　　要：将脉冲磁场施加在TC4钛合金时效过程中,分析脉冲磁场对TC4时效后显微组织及力学性能的影响。通过引入扩散理论,探究脉冲磁场在时效过程中对析出相的影响。结果表明,经过脉冲磁场处理后,显微组织中的析出相数量明显增多,尺寸变小,且分布更加弥散。外加脉冲磁场时效0.5 h相较于未施加磁场时效4 h,抗压强度增加了35 MPa,维氏硬度提高了357 MPa。脉冲磁场可以促进次生α相析出,极大地减少了时效所需的时间。从析出动力学角度分析,脉冲磁场通过使原子团簇受到电子风力和磁化应力的耦合作用,从而提升了扩散通量,促进次生α相析出。A pulsed magnetic field was applied to the aging process of TC4 titanium alloy. The effect of pulsed magnetic field on microstructure and the mechanical properties of TC4 alloy after aging was analyzed. By introducing atomic diffusion theory, the effect of pulsed magnetic field on precipitated phase in aging process was investigated. The results show that after pulsed magnetic field treatment, the number of precipitated phases in the microstructure increases obviously, the size becomes smaller, and the distribution becomes more disperse. Compared with those of the alloy aged for 4 h without magnetic field, the Vickers hardness and compressive strength of the alloy aged for 0.5 h with pulsed magnetic field increase by 357 MPa and 35 MPa, respectively. Pulsed magnetic field can promote the precipitation of secondary α phase, which greatly reduces the aging time. From the perspective of precipitation kinetics,the pulsed magnetic field can increase the diffusion flux and promote the secondary α phase precipitation by coupling effect of the electron wind force and magnetization stress.

关 键 词：TC4钛合金 脉冲磁场 显微组织 扩散理论 

分 类 号：TG146.23[一般工业技术—材料科学与工程]