为了研究再结晶对面心立方(FCC)金属断裂模式的影响,以纯铝为对象采用电子背散射衍射、拉伸试验和扫描电镜分析等研究了纯铝拉伸断裂的模式,并结合3D晶体有限元模拟了变形过程中纯铝中孔洞的长大行为.结果表明:由于晶粒间不均匀变形使得大角度晶界上的等效塑性应变大于单个晶粒中的等效塑性应变,孔洞易沿着大角度晶界长大,使得再结晶后FCC结构的纯铝易发生沿晶断裂.
所属栏目
物理模拟与数值模拟国家自然科学基金资助项目(50905188);省教育厅资助项目(09C383);博士科研启动基金资助项目
收稿日期
2009/4/212010/3/5
作者单位
刘文辉:湖南科技大学机电工程学院, 湘潭 411201
王猛:中联重科研究院, 长沙 410205
李茂华:湖南科技大学机电工程学院, 湘潭 411201
备注
刘文辉(1978-),男,湖南攸县人,博士.
引用该论文:
LIU Wen-hui,WANG Meng,LI Mao-hua.Fracture Mode of Recrystallized FCC Metals and FEM Analysis[J].Materials for mechancial engineering,2010,34(5):90～93
刘文辉,王猛,李茂华.再结晶后面心立方金属的断裂模式及有限元分析[J].机械工程材料,2010,34(5):90～93
参考文献
【1】
ALARCON O E,NAZAR A M M,MONTEIRO W A.The effect of microstructure on the mechanical behavior and fracture mechanism in a 7050-T76 aluminum alloy[J].Mater Sci Eng,1991,138:275-285.
【2】
DORWARD R C,BEEMTSEN D J.Grain structure and quench-rate effects on strength and tougness of AA 7050 Al-Zn-Mg-Cu-Zr alloy plate[J].Metall Mater Trans A,1995,26:2481-2484.
【3】
DESHPANDE N U,GOKHALE A M,DENZER D K,et al.Relationship between fracture toughness,fracture path,and microstructure of 7050 aluminum alloy: part I: quantitative characterization[J].Metall Mater Trans A,1998,29:1191-1201.
【4】
GOKHALE A M,DESHPANDE N U,DENZER D K,et al.Relationship between fracture toughness,fracture path,and microstructure of 7050 aluminum alloy: part II: multiple micromechanisms-based fracture toughness model[J].Metall Mater Trans A,1998,29:1203-1210.
【5】
MORERE B,EHUSTROM J C,GREGSON P J,et al.Microstructural effects on fracture toughness in AA7010 plate[J].Metall Mater Trans A,2000,31:2503-2515.
【6】
SHU J Y.Scale dependent deformation of porous single crystals[J].International Journal of Plasticity,1998,14:1085-1107.
【7】
ORSINI V C,ZIKRY M A.Void growth and interaction in crystalline materials[J].Int J Plasticity,2001,17:1393-1417.
【8】
O’ REGAN T L,QUINN D F,HOWE M A,et al.Void growth simulations in single crystals[J].Comput Mech,1997,20:115-121.
【9】
POTIRNICHE G P,HEARNDON J L,HORSTEMEYER M F,et al.Lattice orientation effects on void growth and coale-scence in fcc single crystals[J].Int J Plasticity,2006,22:921-942.
【10】
LIU W H,ZHANG X M,TANG J G,et al.Simulation of void growth and coalescence behavior with 3D crystal plasti-city theory[J].Comput Mater Sci,2007,40:130-139.
【11】
PI Hua-chun,HAN Jing-tao,ZHANG Chuan-guo,et al.Modeling uniaxial tensile deformation of polycrystalline Al using CPFEM[J].Journal of University of Science and Technology Beijing,2008,15(1):43-47.
【12】
TANG J G,ZHANG X M,DENG Y L.Simulation of rolling textures of FCC metals with crystal plasticity finite element model[J].Mat Sci Technol,2006,22(10):1171-1176.
【13】
LI Z H,GUO W L.The influence of plasticity mismatch on the growth and coalescence of spheroidal voids on the bimaterial interface[J].Int J Plasticity,2002,18:249-279.
