期刊
SCRIPTA MATERIALIA
卷 192, 期 -, 页码 13-18出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2020.09.047
关键词
Steel; Microcrack; Additive; Microstructure; Heat treatment
The study demonstrates that a dual-pass laser treatment applied to low carbon lath martensitic steel can simultaneously repair cracks, reduce surface roughness, and trigger phase transformations to create a more damage-resistant microstructure. The research investigates these influences using various analyses and mechanical tests, and discusses the underlying mechanisms.
The fast development of various additive manufacturing processes is motivating research to improve microstructure control during laser assisted treatments, in order to spatially vary material properties on engineering components. In the present work, we demonstrate that a dual-pass laser treatment applied to a low carbon lath martensitic steel can simultaneously repair solidification or fatigue cracks, reduce surface roughness, and, most importantly, trigger phase transformations to create a more damage-resistant microstructure, namely, one that includes interlath austenite. We investigate these influences employing various scanning electron microscopy and transmission high energy X-ray diffraction analyses, mechanical characterization tests, and discuss the underlying mechanisms. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据