材料科学与工程学报2018，Vol.36Issue(1)：15-20,34,7.DOI:10.14136/j.cnki.issn1673-2812.2018.01.004
晶粒位向对AZ31挤压板材Hall-Petch关系的影响
Influence of Grain Orientation on Hall-Petch Relationships for Extruded AZ31 Plate
摘要
Abstract
Tensile properties and deformation behaviors were investigated along different direction (angle) of the annealed AZ31 extruded plate.Then dislocation types were analyzed to confirm the deformation modes at different angles.The results show that the yield strength and grain size at different angle,θ,between the tensile loading direction and normal direction of the plate,namely 0°,22.5°,45°,67.5°,90°,obeys H-P relationship while their parameters are different.The parameter values at 0° had the highest friction stess,σ0,and the lowest strength coeffident,Ky,dominated by extension twin and prismatic slip.At 45°,it had the lowest σ0 and highest Ky,dominated by basal slip.<c> and <a+c> dislocation emerged at 90° and the parameters were dominted by the co-work of prismatic slip and extension twin whose values close to the 0°.Besides,extension twin can change the grian orientation to coordinate deformation and help to activate non-basal slip.关键词
镁合金/变形行为/拉伸孪晶/位错/滑移Key words
Magnesium alloy/deformation behaviors/extension twin/dislocation/slip分类
矿业与冶金引用本文复制引用
季芸,李德江,曾小勤,丁文江..晶粒位向对AZ31挤压板材Hall-Petch关系的影响[J].材料科学与工程学报,2018,36(1):15-20,34,7.基金项目
国家重点研发计划资助项目(2016YFB0301002),国家自然科学基金资助项目(51131107) （2016YFB0301002）
