News Column

Reports Outline Metallurgy Findings from Institute of Science

May 27, 2014

By a News Reporter-Staff News Editor at Journal of Technology -- Researchers detail new data in Metallurgy. According to news originating from Taegu, South Korea, by VerticalNews correspondents, research stated, "Laser surface tempering causes reduction in the surface hardness without affecting the bulk material hardness. The tempering behavior can be advantageous in advanced manufacturing processes that require controlled softening of the surface layers of through-hardened high-strength steels."

Our news journalists obtained a quote from the research from the Institute of Science, "This paper presents a computational phase change kinetics-based model for selecting the laser parameters that temper the surface layers of a through-hardened hyper-eutectoid steel (AISI 52100) over a known depth. First, a three-dimensional analytical thermal model is used to evaluate the temperature field produced in the material due to thermal cycles produced by laser scanning of the surface. The computed temperature histories are then fed to the phase-change model to predict the surface and subsurface hardness for the chosen laser-processing conditions. Microstructural analysis of the laser-treated AISI 52100 workpiece surface is presented for different laser-processing conditions."

According to the news editors, the research concluded: "It is shown that good agreement is achieved between the predicted and measured surface hardness."

For more information on this research see: Modeling of Laser-Tempering Process for Hyper-Eutectoid Steels. Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science, 2014;45A(5):2612-2625. Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science can be contacted at: Springer, 233 Spring St, New York, NY 10013, USA.

The news correspondents report that additional information may be obtained from S. Raghavan, Daegu Gyeongbuk Inst Sci & Technol, Dept. of Emerging Mat Sci, Taegu, South Korea. Additional authors for this research include S.N. Melkote and J.I. Hong.

Keywords for this news article include: Asia, Taegu, Metallurgy, South Korea

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Source: Journal of Technology

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