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Verification of Johnson-Cook parameters of ferritic stainless steel by drilling process: experimental and finite element simulations
Journal of Materials Research and Technology ( IF 6.4 ) Pub Date : 2020-04-01 , DOI: 10.1016/j.jmrt.2020.03.045
Mehmet Erdi Korkmaz

Ferritic stainless steels contain 16%–30% chromium and about 0.05%–0.25% carbon in their compositions. As the carbon and chromium content is high, precipitation of carbide particles provides high strength but also causes brittleness. Ferritic stainless steels are of moderate formability with an excellent corrosion resistance and relatively inexpensive. In this study, the predetermined JC model parameters of the AISI 430 ferritic steels have been verified by comparing the experimental drilling process and drilling simulations. Firstly, the drilling experiments of 430 steel with the uncoated tungsten carbide drill have been performed at three different feed rates and cutting speeds. Then, the pre-determined JC parameters have been adapted into a simulation software running with the finite element method and after the drilling simulations have been operated under the same drilling conditions. By comparing the experimental and numerical data based on the thrust force (Fz), a deviation of 4.83% has been calculated and the validity of the material's JC parameters has been demonstrated.



中文翻译:

通过钻孔验证铁素体不锈钢的Johnson-Cook参数:实验和有限元模拟

铁素体不锈钢的成分中含有16%–30%的铬和约0.05%–0.25%的碳。由于碳和铬含量高,碳化物颗粒的沉淀提供了高强度,但也导致了脆性。铁素体不锈钢具有中等的可成形性,具有出色的耐腐蚀性和相对便宜的价格。在这项研究中,通过比较实验钻孔过程和钻孔模拟,已验证了AISI 430铁素体钢的预定JC模型参数。首先,在三种不同的进给速度和切削速度下,用未涂层的碳化钨钻头进行了430钢的钻孔实验。然后,预先确定的JC参数已被适配到以有限元方法运行的模拟软件中,并且在相同的钻井条件下进行了钻井模拟之后。通过比较基于推力(Fz)的实验数据和数值数据,计算得出的偏差为4.83%,并证明了该材料的JC参数的有效性。

更新日期:2020-04-21
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