Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 711, Issue -, Pages 258-266Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2017.03.354
Keywords
Laser; Magnesium alloy; High temperature tensile properties; Microstructure
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Funding
- NNSF of China [51505321]
- Liaoning province natural science foundation [2014020155]
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Laser surface melting was used to treat the surface of a magnesium alloy for improving the mechanical behavior at elevated temperatures. The results revealed that grain refinement and enhanced micro hardness are obtained by LSM treatment. The tensile test results at room temperature and elevated temperatures indicated that strength of LSM treated sample increases compared with as-received sample, while ductility decreases. Fractography indicated that ductile mode was the fracture characteristic of laser melted zone at room and elevated temperatures. Non dynamic recrystallization in the laser melted zone, fracture crack deflection and stress transfer were responsible for the increased strength of LSM treated sample at elevated temperatures. (C) 2017 Elsevier B.V. All rights reserved.
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