确定片层状断裂带渗碳体片层破碎的解析模型

IF 1.5 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Philosophical Magazine Pub Date : 2023-01-10 DOI:10.1080/14786435.2022.2162143

J. Maity

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引用次数: 1

摘要

摘要:本文首次提出并实现了一个分析模型，用于研究共析钢奥氏体化早期在层状断裂部位发生的渗碳体片层破碎动力学。该模型是在两种主要扩散现象的基础上建立的;即渗碳体薄片内曲率相关的扩散和奥氏体中的扩散辅助溶解。鉴于所确定的各自的动力学因素，我们认为这两种扩散现象都具有足够的意义。在奥氏体化温度为775℃的等温保温过程中，对该模型进行了必要的实验验证。所建立的模型与实验结果吻合较好。据此预测了共晶钢不完全奥氏体热处理的片层断裂时间为260 s。

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An analytical model to ascertain the fragmentation of cementite lamella at lamellar fault sites

ABSTRACT An analytical model is conceptualised and implemented for the first time to study the kinetics of cementite lamella fragmentation at the lamellar fault site occurring at an early stage of austenitisation in eutectoid steel. The model is conceived on the basis of two prime diffusion phenomena; namely, the curvature-dependent diffusion within cementite lamella and the diffusion-assisted dissolution in austenite. Both these diffusion phenomena are observed to have adequate significance in view of respective kinetic factors ascertained therein. The model is validated with necessary experimental work pertaining to the progress of lamellar fragmentation during isothermal holding at an austenitisation temperature of 775°C. The experimental result is closely followed by the developed model. A lamellar fragmentation time of 260 s is predicted accordingly for the incomplete austenitisation-based heat treatment of eutectoid steel.

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来源期刊

Philosophical Magazine 工程技术-材料科学：综合

自引率

0.00%

发文量

审稿时长

4.7 months

期刊介绍： The Editors of Philosophical Magazine consider for publication contributions describing original experimental and theoretical results, computational simulations and concepts relating to the structure and properties of condensed matter. The submission of papers on novel measurements, phases, phenomena, and new types of material is encouraged.