ANALYSIS OF THE EFFECTIVE AND INTERNAL CYCLIC STRESS COMPONENTS IN CAST γ-TiAI BASED ALLOY

摘要：

Cyclic strain controlled multiple step tests in air have been performed on cylindrical specimens of cast γ-based alloy Ti-48Al-2Nb-2Cr-0.82B at.％ with nearly lamellar microstructure of γ and α2 phases at 23 and 750 ℃.The objective was to analyze the internal and effective cyclic stress components which were derived from the hysteresis loops analyzed according to the statistical theory of hysteresis loop.Dislocation structures in cyclically strained specimens at room temperature were observed using TEM.Cyclic response at both temperatures was compared and discussed in relation to changes of internal and effective stress components and dislocation modes in y phase observed and referred in the literature.

关键词： low cycle fatigue TiAl alloy hysteresis loop dislocation structure

作者: M.Petrenec J.Polak T.Kruml B.Bucek

作者单位: Institute of Physics of Materials,Academy of Sciences of the Czech Republic,Zizkova 22,616 62 Brno,Czech Republic

会议类型: 国际会议

会议名称: The Third International Conference on Heterogeneous Material Mechanics(第三届国际非均匀材料力学会议)

会议地点: 上海

会议语种:英文

页码: 921-924

在线出版日期: 2011-05-22（万方平台首次上网日期，不代表论文的发表时间）