Unveiling the influence of dendrite characteristics on the slip/twinning activity and the strain hardening capacity of Mg-Sn-Li-Zn cast alloys

作     者：MS.Jalali A.Zarei-Hanzaki M.Mosayebi H.R.Abedi M.Malekan M.Kahnooji E.Farabi Su-Hyeon Kim 

作者机构：Hot Deformation and Thermomechanical Processing Laboratory of High Performance Engineering MaterialsSchool of Metallurgy and Materials EngineeringCollege of EngineeringUniversity of TehranTehranIran Materials Science and Engineering DepartmentMcMaster University1280 Main Street WestHamiltonON L8S 4L8Canada School of Metallurgy&Materials EngineeringIran University of Science and Technology(IUST)TehranIran Institute for Frontier MaterialsDeakin UniversityGeelongVictoria 3216Australia Korea Institute of Materials Science(KIMS)797 ChangwondaeroSeongsanguChangwonGyeongnam 51508Republic of Korea 

出 版 物：《Journal of Magnesium and Alloys》 (镁合金学报（英文）)

年 卷 期：2023年第11卷第1期

页      面：329-347页

核心收录：

学科分类：0806[工学-冶金工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 0801[工学-力学（可授工学、理学学位）] 

主　　题：Magnesium alloys Dendrite orientation selection Solidification texture Dendrite fragmentation 3-D tomography analysis Thermomechanical processing 

摘      要：This work explores the correlation between the characteristics of the cast structure(dendrite growth pattern,dendrite morphology and macro-texture)and strain hardening capacity during high temperature deformation of Mg-5Sn-0.3Li-0 and 3Zn multi-component *** three dimensional(3D)morphology of the dendrite structure demonstrates the transition of the growth directions from,andtoanddue to the addition of *** simultaneous effects of growing tendency and the decrement of dendrite coarsening rate at the solidification interval lead to dendrite morphology transition from the globular-like to the hyper-branch *** morphology transition results in the variation of the solidification macro-texture,which has effectively influenced the dominant deformation mechanisms(slip/twin activity).The higher activity of the slip systems increases the tendency of the dendrite arms for bending along the deformation direction and *** from this,the dendrite holding hyper-branch structure with an average thickness below 20μm are more favorable for *** dendrite fragmentation leads to considerable softening fractions,and as an effective strain compensation mechanism increases the workability of dendritic structure.