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Effects of prior microstructure and heating rate on the depth of increased hardness in laser hardening : comparison of computer simulation and experimental results
Mole, Nikolaj (Author), Bojinović, Marko (Author), Koc, Pino (Author), Štok, Boris (Author)

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Abstract
The response of the hypo-eutectoid steel to laser hardening, which is measured as the depth of the increased hardness, depends not only on the set of the process parameters but also on the prior microstructure of the workpiece. The multiple preliminary stages of the treatment of the workpiece in the industrial conditions are commonly not completely known, resulting in an unclear prior microstructure of the workpiece. To model the response of the hypo-eutectoid steel, a validated numerical model for laser hardening has been used in the computer simulation of the process for four different cases. The numerical model takes into account the 3D geometry of the workpiece, its prior microstructure, and the effect of the heating rate during the laser hardening process on the kinetics of the phase transformation. The four cases were designed to take into account two different sets of process parameters and two different prior microstructures of the workpiece. The output of the computer simulation was verified experimentally.

Language:English
Keywords:prior microstructures, heating rate, laser hardening, computer simulations
Work type:Article (dk_c)
Tipology:1.01 - Original Scientific Article
Organization:FS - Faculty of Mechanical Engineering
FMF - Faculty of Mathematics and Physics
Year:2018
Number of pages:16 str.
Numbering:Vol. 8, iss. 12, art. 1016
UDC:539.4(045)
ISSN on article:2075-4701
DOI:10.3390/met8121016 This link opens in a new window
COBISS.SI-ID:16374043 This link opens in a new window
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Downloads:24
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Record is a part of a journal

Title:Metals
Shortened title:Metals
Publisher:MDPI
ISSN:2075-4701
COBISS.SI-ID:15976214 This link opens in a new window

Document is financed by a project

Funder:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije (ARRS)
Project no.:P2-0263
Name:Mehanika v tehniki

Licences

License:CC BY 4.0, Creative Commons Attribution 4.0 International
Link:http://creativecommons.org/licenses/by/4.0/
Description:This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
Licensing start date:03.12.2018

Secondary language

Language:Slovenian
Keywords:mikrostrukture, hitrost segrevanja, lasersko kaljenje, računalniške simulacije

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