Cavitation shotless peening for improvement of fatigue strength of carbonized steel
Cavitation shotless peening for improvement of fatigue strength of carbonized steel
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DOI：
10.1016/s0142-1123(03)00121-x
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发表时间：
2003-09-01
影响因子：
6
通讯作者：
Soyama, H
中科院分区：
文献类型：
--
作者：
Odhiambo, D;Soyama, H
空蚀无喷丸（CSP）是一种利用空蚀冲击在金属材料表面产生残余压应力，从而提高构件疲劳寿命的表面强化技术。该技术类似于喷丸14，除了不使用喷丸之外，这就是为什么我们将其称为无喷丸。在CSP的情况下，使用具有空化的浸没高速水射流，即空化射流。为了探索CSP作为提高疲劳强度的一种手段的潜力，已分析了非喷丸，喷丸和CSP条件下的加工时间，残余应力和循环应力曲线的铬钼合金钢（JIS SCM415）。用X射线衍射法测定残余应力。实验结果证实，CSP试样的旋转梁疲劳强度比非喷丸和喷丸试样分别强79和27 MPa。(C)2003 Elsevier Ltd.保留所有权利。
Cavitation shotless peening (CSP) is a surface enhancement technique which makes use of cavitation impact to induce compressive residual stress on the metallic materials, thereby increasing the fatigue life of components. The technique is similar to shot peening 14 except that shots are not used and that is why we refer to it as shotless peening. In case of CSP a submerged high-speed water jet with cavitation, i.e. a cavitating jet is used. To explore the potentials of CSP as a means of improving fatigue strength, carbonized chrome-molybdenum alloy steel (JIS SCM415) has been analyzed in the non-peened, shot-peened and CSP conditions with respect to processing times, residual stress and cyclic-stress curves. The residual stress was measured by an X-ray diffraction method. Experimental results confirmed that the rotating beam fatigue strength of a CSP specimen was stronger than non-peened and shot-peened specimens by 79 and 27 MPa, respectively. (C) 2003 Elsevier Ltd. All rights reserved.