Fatigue behaviour of duplex stainless steel reinforcing bars subjected to shot peening
Fatigue behaviour of duplex stainless steel reinforcing bars subjected to shot peening
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DOI：
10.1111/j.1460-2695.2009.01360.x
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发表时间：
2009-07
影响因子：
3.7
通讯作者：
E. Real;C. Rodríguez;F. Belzunce;P. Sanjurjo;A. Canteli;I. F. Pariente
中科院分区：
文献类型：
--
作者：
E. Real;C. Rodríguez;F. Belzunce;P. Sanjurjo;A. Canteli;I. F. Pariente
研究了喷丸处理对热轧和冷轧工艺制造的双相不锈钢钢筋疲劳性能的影响。测定了喷丸处理前后钢筋的S-N曲线，表明喷丸处理改善了钢筋的疲劳行为。这种改进本质上是由于在钢筋表面引入了压缩残余应力场，同时也是由于制造过程中产生的表面缺陷和冷加工的平滑。热轧棒材的这种改进要大得多，主要是因为它们具有更高的塑性变形能力，而冷轧棒材的硬度要高得多。为了提高冷轧钢筋的抗疲劳性能，需要采取更严格的喷丸处理，以促进钢筋表面产生更大的塑性变形。
The influence of shot peening on the fatigue properties of duplex stainless steel reinforcing bars manufactured using both hot- and cold-rolled processes was studied. The S-N curves of the bars before and after the shot-peening process were determined, showing that shot peening improves the fatigue behaviour of the rebars. This improvement is essentially due to the introduction of a compressive residual stress field in the surface of the reinforcing bars, but also to the smoothing of the surface flaws and cold working generated during the manufacturing process. This improvement is much greater in the case of the hot-rolled bars, mainly as a result of their much higher ability for plastic deformation, whereas cold-rolled bars had a much higher hardness. A more severe peening action capable of promoting greater plastic deformation on the bar surface is judged necessary to improve the fatigue resistance of cold-rolled rebars.