广西科技大学学报2024，Vol.35Issue(2)：145-152,8.DOI:10.16375/j.cnki.cn45-1395/t.2024.02.018
热处理对石墨烯镁基复合材料拉伸性能及微结构的影响
Effect of heat treatment on tensile properties and micro-structure of graphene-magnesium matrix composites
摘要
Abstract
To study the effect of aging on the mechanical properties of graphene nanoplatelets/magnesium matrix composites(GNPs/AZ31),GNPs/AZ31 were subjected to solid solution heat treatment at 300℃for 1 h and 200℃for 4,8,12,16,20 and 24 h,respectively,and the microstructure characterization and tensile properties tests of GNPs/AZ31 at different aging time were carried out.The uniaxial tensile mechanical tests revealed that the mechanical properties of GNPs/AZ31 showed a trend of increasing and then decreasing with the increase of aging time,and the best overall mechanical properties were obtained at 20 h of aging,with tensile strength,yield strength,elongation,fracture work and microhardness of 381 MPa,258 MPa,23.7%,76 J/m3 and 75.7 HV,respectively,which compared with those of the untreated GNPs/AZ31 composites increased by 9.5%,4.5%,13.9%,24.6%and 37.6%,respectively.The results of microstructural characterization tests showed that the number of precipitated second phase(Mg17Al12)within GNPs/AZ31 increased significantly with increasing aging time,and the aging processes were all dominated by increasing the continuous precipitation of small-sized particles＜1.0 μm.XRD patterns showed that the intensity of Mg17Al12 phase diffraction peaks was enhanced with increasing aging time;The intensity of the(0002)basal texture of GNPs/AZ31 was improved with increasing aging time.This study can provide important experimental data for improving the comprehensive mechanical properties of GNPs/AZ31.关键词
GNPs/AZ31/石墨烯/时效/析出相/织构强度Key words
GNPs/AZ31/graphene/aging/precipitation phase/texture strength分类
矿业与冶金引用本文复制引用
华振虎,蓝永庭,丁浩川,解远航,柯昌锐..热处理对石墨烯镁基复合材料拉伸性能及微结构的影响[J].广西科技大学学报,2024,35(2):145-152,8.基金项目
国家自然科学基金项目(12262003) （12262003）
广西自然科学基金项目(2022GXNSFAA035537) （2022GXNSFAA035537）
广西科技大学博士基金项目(校科博21Z13) （校科博21Z13）
广西科技大学研究生教育创新计划项目(GKYC202204)资助 （GKYC202204）
