EXPERIMENTAL AND CRYSTAL PLASTICITY INVESTIGATIONS OF INITIAL STRESS IN THERMALLY TREATED TITANIUM AND NICKEL ALLOYS
A crystal plasticity model for hep crystals has been developed which takes due account of the anisotropy which is known to exist in the thermal expansivity.The c-axis expansivity is generally thought to be lower than that tor the a-directions and on cooling of a polycrystal (in processing,for example),this potentially leads to the establishment of type il strains and initial stresses which therefore exist prior to in-service loading.Figure 1 below shows a schematic of a model hep polycrystal in which the crystailographic orientations may be specified within our crystal plasticity finite element formulation (Dunne et al,2007).
R.Kiwanuka F.P.E.Dunne
Department of Engineering Science,University of Oxford,Parks road,Oxford 0X1 3PJ,UK
国际会议
The Third International Conference on Heterogeneous Material Mechanics(第三届国际非均匀材料力学会议)
上海
英文
332-333
2011-05-22（万方平台首次上网日期，不代表论文的发表时间）