Study on Dynamic Recrystallization under Thermal Cycles in the Process of Direct Energy Deposition for 316 L Austenitic Stainless Steel

Autor:	Manping Cheng, Xi Zou, Tengfei Chang, Lehui Liu
Jazyk:	angličtina
Rok vydání:	2024
Předmět:	additive manufacturing dynamic recrystallization thermal cycles 316 L stainless steel Technology Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
Zdroj:	Materials, Vol 17, Iss 19, p 4860 (2024)
Druh dokumentu:	article
ISSN:	1996-1944
DOI:	10.3390/ma17194860
Popis:	In the process of directed energy deposition (DED), the grain structure of the deposited samples is determined by two aspects. The first is the initial solidification grain structure; the second is the effect of the upper thermal cycle on the solidified grain structure of the lower layer. Dynamic recrystallization and grain growth can be activated under suitable strain and the temperature resulting from thermal cycles. The evolution of grain size and the geometric dislocation density (GND) of austenitic stainless steel 316 L under different strains and temperatures caused by thermal cycles was investigated. It is found that dynamic recrystallization requires an appropriate level of accumulated strain, temperature, and initial grain size. Under
Databáze:	Directory of Open Access Journals
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