Laser surface alloying of an Mg alloy with Al + Mn to improve corrosion resistance

IF 0.6 4区工程技术 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Lasers in Engineering Pub Date : 2002-01-01 DOI:10.1080/0898150021000039275

J. Majumdar, T. Maiwald, R. Galun, B. Mordike, I. Manna

引用次数: 26

Abstract

In the present study, an attempt has been made to enhance the corrosion resistance of a Mg alloy (MEZ) by laser surface alloying with Al + Mn. Laser surface alloying has been carried out with a 10 kW continuous wave CO 2 laser by melting and simultaneous feeding of a powder mixture of Al and Mn in the ratio of 3 : 1 and 1 : 3, respectively. Following laser irradiation, the alloyed zone has been characterized by a detailed microstructural observation and phase analysis. Moreover, the properties of the surface alloyed layer like microhardness and corrosion have been evaluated in detail. The surface modified layer predominantly consists of dendrites of Al + Mn and Al + Mg. The microhardness of the alloyed zone has been significantly enhanced to as high as 250-350 VHN as compared to 35 VHN of the substrate region. The corrosion rate in a 3.56 wt.% NaCl solution has significantly reduced to 250 mpy for laser surface alloyed specimen as compared to 1520 mpy of the MEZ substrate. The enhanced corrosion resistanc...

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用Al + Mn激光表面合金化镁合金以提高其耐蚀性

本研究尝试用Al + Mn激光表面合金化的方法提高镁合金(MEZ)的耐蚀性。采用10 kW连续波co2激光器，分别以3:1和1:3的比例熔化和同时进料Al和Mn的混合粉末，进行了激光表面合金化。激光辐照后，对合金区进行了详细的显微组织观察和物相分析。此外，还详细评价了表面合金层的显微硬度和腐蚀性能。表面改性层主要由Al + Mn和Al + Mg枝晶组成。合金区的显微硬度从基体区的35 VHN显著提高到250-350 VHN。在3.56 wt.% NaCl溶液中，激光表面合金试样的腐蚀速率从MEZ基体的1520 mpy显著降低至250 mpy。增强的耐蚀性…

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Lasers in Engineering 工程技术-材料科学：综合

CiteScore

1.00

自引率

20.00%

发文量

审稿时长

3.4 months

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.