Flow Stress and Phase Transformation Analyses in Austenitic Stainless Steel Under Cold Working : Part 2, Incremental Theory Under Multiaxial Stress State by the Finite-Element Method
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概要
- 論文の詳細を見る
In the first paper, it has been shown that in 304 austenitic stainless steels, the martensitic phase induced by cold working, generates a flow stress growth according to deforming conditions given to the material. Moreover, constitutive equations for the aggregate have been formulated under a uniaxial stress state. In this second paper, the study has been extended to develop an incremental formulation to analyze multiaxial plastic deformation problems. The incremental constitutive model is formulated by considering the austenite-martensite phase transformation, flow stress under a multiaxial stress state, compliance of each phase and temperature, whose effects are included simultaneously in each parameter. A method of rigid-plastic finite-element analysis is proposed in order to estimate the distributions of transformed martensite and flow stress growth of materials subjected to general kinds of cold working such as forging, extrusion, and deep drawing. The temperature rise distributions due to plastic deformation have been co-analyzed using the above formulation. Some compression tests accompanied by temperature changes have been carried out and they were compared with the theoretical results. Good agreement was confirmed between them. It is demonstrated that the proposed method can be used successfully to determine distributions of both strain-induced martensitic phase and flow stress in austenitic stainless steels under cold-working conditions.
- 一般社団法人日本機械学会の論文
- 1993-01-15
著者
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Tsuta Toshio
Faculty Of Mechanical Engineering Hiroshima University
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Tsuta Toshio
Faculity Of Engineering Hiroshima Univ.
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Cortes R.
Faculty Of Mechanical Engineering Hiroshima University
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