利用原子力显微镜对不同金属试件表面的三维形貌进行了定量表征和分析,并通过建立有限元模型研究了表面微观应力集中的分布及变化.结果表明:不同的表面处理方式、不同的材料性质对表面微观形貌的影响非常明显,而且在金属表面,微观应力的分布与其微观形貌紧密相关,当表面处理方式改变时,表征参数的全面改变是导致微应力集中变化的主要原因,在评价表面状态对疲劳性能的影响时,不能仅考虑表面粗糙度的改变,应当综合分析各表征参数的变化.
参考文献
| [1] | TAYLOR D;CLANCY O M .The fatigue performance of machined surfaces[J].Fatigue & Fracture of Engineering Material & Structure,1991,14(2-3):329-336. |
| [2] | Japanese rocket materials strength property data coordination,Failure analysis reports of LE-7 engine for H-II A rocket(Fracture surface analysis)[R].NRIM,Japan,2000. |
| [3] | CHEN X;HUTCHINSON W .Foreign object damage and fatigue crack threshold:cracking outside shallow indents[J].International Journal of Fracture,2001,107:31-51. |
| [4] | FLUCK P G .The influence of surface roughness on the fatigue life and scatter of test results of two steels[J].Proceedings of American Society for Testing Materials,1951,51:584-592. |
| [5] | BAYOMI M R;ABDELLATIF A K .Effect of surface finish on fatigue strength[J].Engineering Fracture Mechanics,1995,51(05):861-870. |
| [6] | MANTLE A L;ASPINWALL D K .Surface integrity and fatigue life of turned gamma titanium aluminide[J].Journal of Materials Processing Technology,1997,72:413-420. |
| [7] | H. Itoga;K. Tokaji;M. Nakajima .Effect of surface roughness on step-wise S-N characteristics in high strength steel[J].International Journal of Fatigue,2003(5):379-385. |
| [8] | BERGENGREN Y;LARSSON M;MELANDER A .Influence of machining defects and inclusions on the fatigue properties of a hardened spring steel[J].Fatigue & Fracture of Engineering Material & Structure,1995,18(10):1071-1087. |
| [9] | The technical staff of the Machinability Data Center.Machining Data Handbook[M].Cincinnati,Ohio:Machinability Data Center,1980:18-19. |
| [10] | D. Arola;C.L. Williams .Estimating the fatigue stress concentration factor of machined surfaces[J].International Journal of Fatigue,2002(9):923-930. |
| [11] | Yan-Dong Wang;Hongbo Tian;Alexandru D. Stoica;Xun-Li Wang;Peter K. Liaw;James W. Richardson .The development of grain-orientation-dependent residual stressess in a cyclically deformed alloy[J].Nature materials,2003(2):101-106. |
| [12] | Y. X. Gao;J. Z. Yi;P. D. Lee .A micro-cell model of the effect of microstructure and defects on fatigue resistance in cast aluminum alloys[J].Acta materialia,2004(19):5435-5449. |
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