纯钼烧结体弹/塑性力学行为研究  

Study on Elasto-plastic Mechanical Behavior for Sintered Pure Mo Powder

作　　者：李萍[1] 薛克敏[1] 

机构地区：[1]合肥工业大学,安徽合肥230009

出　　处：《稀有金属材料与工程》2013年第4期805-808,共4页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(50875072);霍英东教育基金(121053);安徽省自然科学基金(1308085JGD02)

摘　　要：采用真空烧结技术制备了不同密度的钼试样,通过在MTS810试验机上进行室温准静态单向压缩试验,研究了在不同的初始密度下,纯钼烧结体压缩变形流变应力的变化规律。建立了流变应力的数学模型以及弹/塑性参数的计算模型。基于可压缩连续体的屈服准则和塑性本构关系,确定了纯钼烧结材料压缩变形的屈服条件及其弹/塑性本构关系。Mo specimens with different initial relative density were prepared by a vacuum sintering technique. The effects of the initial relative density on the flow stress of the sintered Mo powder were studied by room temperature quasi-static uniaxial compression tests at a MTS810 universal material testing machine. The mathematic model of the flow stress and the calculation model of the elasto-plastic parameters for the sintered Mo powder were established. Based on the yield criterion and plastic constitutive equation for compressible dense materials, the yield function and the elasto-plastic constitutive model of the sintered Mo powder during compression deformation was determined.

关 键 词：弹 塑性 本构模型 屈服条件 纯钼烧结体 

分 类 号：TG115.53[金属学及工艺—物理冶金]