A study of the void surface healing mechanism in 316LN steel

IF 1.6 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY High Temperature Materials and Processes Pub Date : 2023-01-01 DOI:10.1515/htmp-2022-0282

Mingli Qin, Jiansheng Liu, Jing-dan Li, Xuezhong Zhang

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Abstract

Abstract The behavior of void surface healing in 316LN steel samples undergoing thermal plasticity deformation was investigated using the Gleeble 1500 thermomechanical simulator. The characterization of the void surface after plastic deformation was analyzed under different deformation temperatures, deformation amounts, and holding time durations. The morphology evolution and microstructure of the void surface healing zone during thermal plasticity deformation and holding time duration stage were analyzed using electron back scatter diffraction imaging. The mechanism of void surface healing under thermal plasticity deformation was investigated. It was found that the degree of void surface healing increases with the degree of deformation and the duration of the holding time. Dynamic recrystallization occurred continuously at the void surface, resulting in a plethora of crystal defects and a substantial amount of energy. These conditions were conducive to atomic diffusion and migration, thereby promoting the healing process of the void surface. Maintaining high temperature after deformation can continue to provide energy for the diffusion and migration of atoms, promotes the growth of recrystallized grains, and gradually heals the void surface.

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316LN钢孔隙表面愈合机制的研究

摘要利用Gleeble 1500热机械模拟机研究了316LN钢热塑性变形试样中孔隙表面的愈合行为。分析了不同变形温度、变形量和保温时间下塑性变形后孔隙表面的特征。利用电子背散射衍射成像分析了热塑性变形和保温时间阶段孔隙表面愈合区的形态演变和微观结构。研究了热塑性变形下孔隙表面愈合的机理。研究发现，孔隙表面愈合程度随着变形程度和保温时间的延长而增加。在孔隙表面连续发生动态再结晶，导致过多的晶体缺陷和大量的能量。这些条件有利于原子的扩散和迁移，从而促进空隙表面的愈合过程。变形后保持高温可以继续为原子的扩散和迁移提供能量，促进再结晶晶粒的生长，并逐渐愈合孔隙表面。

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来源期刊

High Temperature Materials and Processes 工程技术-材料科学：综合

CiteScore

2.50

自引率

0.00%

发文量

审稿时长

3.9 months

期刊介绍： High Temperature Materials and Processes offers an international publication forum for new ideas, insights and results related to high-temperature materials and processes in science and technology. The journal publishes original research papers and short communications addressing topics at the forefront of high-temperature materials research including processing of various materials at high temperatures. Occasionally, reviews of a specific topic are included. The journal also publishes special issues featuring ongoing research programs as well as symposia of high-temperature materials and processes, and other related research activities. Emphasis is placed on the multi-disciplinary nature of high-temperature materials and processes for various materials in a variety of states. Such a nature of the journal will help readers who wish to become acquainted with related subjects by obtaining information of various aspects of high-temperature materials research. The increasing spread of information on these subjects will also help to shed light on relevant topics of high-temperature materials and processes outside of readers’ own core specialties.