Transactions of Materials and Heat Treatment

Title：Experimental study of the influence of forming process on material fatigue performance

Authors： Chen Wei Na Jingxin Hu Yuemeng

Unit： Nanjing Institute of Technology Jilin University

KeyWords： fatigue performance forming process pre-deformation S-N curve

ClassificationCode：TG386

year,vol(issue):pagenumber：2015,40(12):126-130

Abstract：

The influence of the pre-deformation caused by forming process on material fatigue performance was studied by combining the experimental test with the theoretical analysis. The pre-tensile experiments of different deformation amounts were designed to consider the different deformations caused by forming process. For the problem that the fatigue limit with symmetric cyclic load of the sheet sample was not carried out, it was proposed that an experiment-computation method combining 0.1 stretch-stretch cyclic loading with Gerber reverse modifications, and then the endurance fatigue limit of the sheet sample under symmetric cyclic load was gained. Then the curve fitting was done for material fatigue limit under different deformation magnitude, and the rule between the deformation amount and material fatigue limit was obtained. Finally the materials S-N curve was simplified for engineering application, and S-N curves of several typical deformation amounts were achieved. The fatigue performance testing was greatly reduced on the premise of the engineering requirements.

Funds：

国家自然科学基金资助项目（51075187）；南京工程学院校级科研基金资助项目（YKJ201433）

作者简介：陈伟(1985-)，男，博士，讲师

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