{"title":"A mathematical model to predict the thermal history and microstructure developed in laser surface alloying","authors":"J. Majumdar, I. Manna","doi":"10.1080/0898150021000039284","DOIUrl":null,"url":null,"abstract":"Laser surface alloying involves tailoring the surface microstructure and composition by rapid melting, intermixing and solidification of a pre/co-deposited surface layer with a part of the underlying substrate. It is a potential method of enhancing hardness and wear resistance of engineering components. In the present study, a one-dimensional heat transfer model based on the explicit finite difference method has been developed to predict the thermal history (i.e., temperature profile, thermal gradient, cooling rate and solid-liquid interface velocity) and hence, the microstructure of the alloyed zone developed by laser surface alloying. The incident laser power and laser-matter interaction time are chosen as the main variables to study the effect of laser parameters on thermal history, and consequently, microstructure of the alloyed zone. The numerical calculations have been carried out for the model system of AISI 304 stainless steel laser surface alloyed with pre-deposited molybdenum. The predicted resu...","PeriodicalId":49918,"journal":{"name":"Lasers in Engineering","volume":null,"pages":null},"PeriodicalIF":0.6000,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"9","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Lasers in Engineering","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1080/0898150021000039284","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 9
Abstract
Laser surface alloying involves tailoring the surface microstructure and composition by rapid melting, intermixing and solidification of a pre/co-deposited surface layer with a part of the underlying substrate. It is a potential method of enhancing hardness and wear resistance of engineering components. In the present study, a one-dimensional heat transfer model based on the explicit finite difference method has been developed to predict the thermal history (i.e., temperature profile, thermal gradient, cooling rate and solid-liquid interface velocity) and hence, the microstructure of the alloyed zone developed by laser surface alloying. The incident laser power and laser-matter interaction time are chosen as the main variables to study the effect of laser parameters on thermal history, and consequently, microstructure of the alloyed zone. The numerical calculations have been carried out for the model system of AISI 304 stainless steel laser surface alloyed with pre-deposited molybdenum. The predicted resu...
期刊介绍：
Lasers in Engineering publishes original (primary) research articles, reviews, short communications and letters on all aspects relating to the application of lasers in the many different branches of engineering and related disciplines.
The topics covered by Lasers in Engineering are the use of lasers: in sensors or measuring and for mapping devices; in electrocomponent fabrication; for materials processing; as integral parts of production assemblies; within the fields of biotechnology and bioengineering; in micro- and nanofabrication; as well as the materials and processing aspects of techniques such as cutting, drilling, marking, cladding, additive manufacturing (AM), alloying, welding and surface treatment and engineering.
Lasers in Engineering presents a balanced account of future developments, fundamental aspects and industrial innovations driven by the deployment of lasers. Modern technology has a vitally important role to play in meeting the increasingly stringent demands made on material and production systems. Lasers in Engineering provides a readily accessible medium for the rapid reporting of new knowledge, and technological and scientific advances in these areas.
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