形变参数对B_(4)C_(P)/6061Al复合材料热变形行为的影响  

Effect of deformation parameters on the hot deformation behavior of B_(4)C_(P)/6061Al composite

作　　者：刘生镤 李德富[1] 郭胜利[1] 陈琴 LIU Shengpu;LI Defu;GUO Shengli;CHEN Qin(General Research Institute for Non-Ferrous Metals,Beijing 100088,China;Jinchuan Group Lanzhou Jinchuan New Material Technology Co.,Ltd.,Jinchuan,Gansu 737100,China)

机构地区：[1]北京有色金属研究总院,北京100088 [2]兰州金川新材料股份有限公司,甘肃金川737100

出　　处：《内蒙古工业大学学报（自然科学版）》2024年第5期475-480,共6页Journal of Inner Mongolia University of Technology：Natural Science Edition

基　　金：国家自然科学基金项目(51205028)。

摘　　要：通过对B_(4)C_(P)/6061Al复合材料进行热压缩实验,系统研究了不同温度和应变速率对其流变应力和微观组织演变的影响。采用EBSD表征方法分析了复合材料的晶粒形貌、取向差角分布和晶粒尺寸的演变规律。结果表明,动态再结晶是复合材料热变形过程中的主要软化机制。随着温度的升高和应变速率的降低,平均晶粒尺寸和大角度晶界比例逐渐增大,在高温低应变速率下,B_(4)C的加入限制了DRX晶粒的生长,导致生长的DRX晶粒被拉长。Hot compression of B_(4)C_(P)/6061Al composite are performed under different temperature and strain rates.Flow stress and the effect of temperature and strain rates on the evolution of microstructure are investigated.EBSD analysis has been employed to illustrate the grain morphology,distribution of misorientation angle and grain size of the composite.The result shows that dynamic recrystallization is the dominant softening mechanism during hot deformation of the composite.It is also concluded that the average grain size and the fraction of high angle grain boundaries increase with increasing temperature and decreasing strain rates.Under high temperature and low strain rates,the growth of DRX grains is limited due to the addition of B_(4)C and the grown DRX grains are elongated.

关 键 词：B_(4)C_(P)/6061Al复合材料 流变行为 微观组织演变 EBSD 

分 类 号：TG1334[一般工业技术—材料科学与工程]