INVESTIGATION OF THE RESIDUAL STRESS-DEPENDENT HARDNESS OF AMORPHOUS ALLOYS

摘要：

Inelastic behavior of the amorphous alloys (also called metallic glasses) is believed to be determined by the inhomogeneous deformation caused by the initiation,multiplication,and interaction of shear bands.Chen and Jiang have done extensive instrumented sharp indention experiments on this kind of materials and observed clearly residual stress-dependent hardness.Moreover,the density of shear bands formed during indentation depends on the stress type,compressive or tensile.A generalized constitutive relation of amorphous alloys based on free-volume model is developed in this paper,followed by detailed three-dimensional finite element simulations of instrumented sharp indentation.The simulation agrees with the experimental observations regarding to the residual stress-dependent hardness and the distribution of the shear band density.A more detailed analysis also address how the dependence of hardness on residual stress is determined by the material properties.

作者: S.Qu Q.Ge L.Chen J.Jiang

作者单位: Department of Engineering Mechanics,Zhejiang University,Hangzhou,Zhejiang,310027 China Department of Materials Science and Engineering,Zhejiang University,Hangzhou,Zhejiang,310027 China

会议类型: 国际会议

会议名称: 第二届国际非均质材料力学会议(The Second International Conference on Heterogeneous Material Mechanics)

会议地点: 安徽黄山

会议语种:英文

页码: 460

在线出版日期: 2008-06-03（万方平台首次上网日期，不代表论文的发表时间）