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논문 기본 정보

자료유형
학술저널
저자정보
E. A. Eid (Higher Technological Institute) M. M. Sadawy (Al-Azhar University)
저널정보
대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.27 No.11
발행연도
2021.11
수록면
4,536 - 4,549 (14page)
DOI
10.1007/s12540-020-00722-9

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초록· 키워드

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The plastic cold rolling deformation is one method to enhance the microstructure and mechanical characteristics of austeniticsteel. The role of effective strain ( ) during cold rolling deformation of the AISI 304 austenitic stainless steel has been studied. The results of the research were collected based on the means of optical, field emission-scanning electron microscopy, X-raydiffraction, microhardness, and tensile stress?strain tests. After 80% of ε, the size of coarse grains of the austenitic phase( FCC) was diminished as well as larger domains were generated from the martensitic phase BCC . Also, the large carbideparticles (M23C6) have been fragmented and they were sprinkled in both phases during the cold rolling process. Therefore,the dislocation density (ρ) has augmented for the deformed alloys. Consequently, the hardness and the ultimate strength(UTS) values are improved to ? 150% and ? 200%, respectively with increasing the effective strain to 80%. Generally, theincrease of the effective strain leads to diminished grain size and increased the values of hardness, yield stress (YS) and UTSof the samples, meanwhile it causes the decrease of their ductility. Moreover, the values of YS have been calculated basedon Hall?Petch, Orowan equations and dislocation strengthening formula. Finally, the calculated and the measured resultswere compared, where both of them are very matching especially at lower values of effective strain.

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