Acta Metall Sin  1988, Vol. 24 Issue (4): 221-227    DOI:

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BAUSCHINGER EFFECT AND DISLOCATION STRUCTURE IN STAINLESS STEEL DURING CYCLIC DEFORMATION

XIA Yuebo;WANG Zhongguang;DU Xiukui Institute of Metal Research; Academia Sinica; Shenyang

XIA Yuebo;WANG Zhongguang;DU Xiukui Institute of Metal Research; Academia Sinica; Shenyang. BAUSCHINGER EFFECT AND DISLOCATION STRUCTURE IN STAINLESS STEEL DURING CYCLIC DEFORMATION. Acta Metall Sin, 1988, 24(4): 221-227.

Abstract References Related Articles Recommended Metrics Download:  PDF(2197KB)  Export:  BibTeX | EndNote (RIS)       Abstract  Cyclical deformation in symmetrical push-pull mode was carriedout on a Cr-Mn-N stainless steel at room temperature in air using a Schenck Hy-dropuls machine. The total strain amplitude which was kept constant during thetest ranges from ±0.004 to ±0.012. The 0.2% offset yield stress σ_(0.2f) in tensile andσ_(0.2r) in compressive and peak stress were measured after various cycles. The Bausch-inger strength differential factor(BSDF) was then calculated from σ_(0.2f) and σ_(0.2r). TheΔE was also calculated from hysteresis loop areas for various cycles. These parame-ters, BSDF, σ and ΔE appear to have two distinctively different stages. The dislocation structures were observed using TEM in specimens deformed cy-clically for various cycles. The observation shows that the dislocations pile-up main-ly at grain boundaries and there exists large amount of deformation twins. Thenitrogen content of 0.25 wt-% places the alloy in the low stacking fault energyregime. Cross-slip and climb are thereform rather difficult to occur during the cy-clic deformation at room temperature, and well-defined dislocation cells and wallscan only be seen at the final stage of fatigue. Key words:  Bauschinger effect      cyclic deformation      dislocation structure      Received:  18 April 1988      Service E-mail this article Add to citation manager E-mail Alert RSS （） Articles by authors URL:  https://www.ams.org.cn/EN/     OR     https://www.ams.org.cn/EN/Y1988/V24/I4/221 1 Bauschinger J. Min Proc Inst Civil Eng, London, 1886; 87: 463 2 Mataya M C, Carr M J. Mater Sci Eng, 1983; 57: 205 3 Stoltz R E, Pclloux R M. Metall Trans, 1976; 7A: 1295 4 Saleh Y, Margolin H. Acta Metall, 1979; 27: 535 5 Abel A, Ham R K. 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