TY - JOUR
T1 - Influence of diode laser heat treatment and wear conditions on the fretting wear behavior of a mold steel
AU - Park, Changkyoo
AU - Kim, Jinwoo
AU - Sim, A.
AU - Sohn, Hyonkee
AU - Jang, Ho
AU - Chun, Eun Joon
N1 - Funding Information:
This research was conducted as part of the project NK217C, funded by the National Research Council of Science and Technology , Republic of Korea.
Funding Information:
This research was conducted as part of the project NK217C, funded by the National Research Council of Science and Technology, Republic of Korea.
Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2019/9/15
Y1 - 2019/9/15
N2 - The effect of surface hardness on the wear loss and wear behavior during fretting was studied for a mold steel, AISI P20-improved. Moreover, the relation between the fretting wear mechanisms and conditions for fretting were investigated. A 4 kW high-power diode laser with a rectangular laser beam was used for heat treatment. The microstructural change from tempered martensite to martensite was detected for the laser heat-treated samples, which led to the increase in the hardness. As a result, a relatively lower coefficient of friction and lesser wear losses were observed for the laser heat-treated specimens in comparison to the base metal. Various tests were conducted to investigate the influence of fretting conditions on the wear behavior by varying the normal loads and frequencies. Larger normal loads led to larger amounts of wear losses, while higher frequencies led to lesser wear losses for both, the base metal and laser heat-treated specimens. Moreover, a transformation from the gross slip mode to the partial slip mode was detected from the hysteresis loops of the base metal and laser heat-treated samples with increasing normal loads and frequencies. The fretting conditions of normal loads and frequencies played a vital role in determining the fretting mode and debris retention, thereby influencing the wear loss and wear behavior.
AB - The effect of surface hardness on the wear loss and wear behavior during fretting was studied for a mold steel, AISI P20-improved. Moreover, the relation between the fretting wear mechanisms and conditions for fretting were investigated. A 4 kW high-power diode laser with a rectangular laser beam was used for heat treatment. The microstructural change from tempered martensite to martensite was detected for the laser heat-treated samples, which led to the increase in the hardness. As a result, a relatively lower coefficient of friction and lesser wear losses were observed for the laser heat-treated specimens in comparison to the base metal. Various tests were conducted to investigate the influence of fretting conditions on the wear behavior by varying the normal loads and frequencies. Larger normal loads led to larger amounts of wear losses, while higher frequencies led to lesser wear losses for both, the base metal and laser heat-treated specimens. Moreover, a transformation from the gross slip mode to the partial slip mode was detected from the hysteresis loops of the base metal and laser heat-treated samples with increasing normal loads and frequencies. The fretting conditions of normal loads and frequencies played a vital role in determining the fretting mode and debris retention, thereby influencing the wear loss and wear behavior.
UR - http://www.scopus.com/inward/record.url?scp=85069723217&partnerID=8YFLogxK
U2 - 10.1016/j.wear.2019.202961
DO - 10.1016/j.wear.2019.202961
M3 - Article
AN - SCOPUS:85069723217
VL - 434-435
JO - Wear
JF - Wear
SN - 0043-1648
M1 - 202961
ER -