TY - JOUR
T1 - Effects of low-power laser hardening on the mechanical and metallurgical properties of biocompatible SAE 420 steel
AU - Wagh, Santoshkumar V.
AU - More, Satish R.
AU - Madhav, V. V.Venu
AU - Saxena, Kuldeep K.
AU - Bandhu, Din
AU - Sunil, B. D.Y.
AU - V, Revathi
AU - Siddiqui, Md Irfanul Haque
N1 - Publisher Copyright:
© 2024
PY - 2024/5/1
Y1 - 2024/5/1
N2 - The present experimental work is carried out on SAE 420 steel to optimize process parameters of low-power laser hardening to improve surface micro-hardness and wear resistance for dry sliding for bio-medical applications. Laser power is the most significant factor for micro-hardening and wear resistance. Rank two for scanning speed and three for standoff distance, respectively. The experiments show that the surface micro-hardness of treated samples varies from 711 to 833 Vickers Pyramid Number by optimized process parameters such as laser beam power of 300 W, laser scan speed of 1.0 mm/s, and standoff distance of 225 mm. In comparison, the base material micro-hardness is 208 Vickers Pyramid Number as the predictive equation generated for finding micro-hardness value for the above three laser hardening process parameters. The dry sliding wear test is conducted on all laser-treated samples and a comparison is made with the untreated sample. A significant improvement in wear resistance was observed for treated as compared to untreated samples. The wear of laser hardened sample of SAE 420 steel was 3.67 x10-9 g/cm compared to untreated base metal wear rate of 139.00 x 10-9 g/cm at an applied load of 30 N and sliding speed of 300 revolutions per minute. The scanning electron microscopy analysis of wear samples (untreated, treated maximum, and minimum hardness) is observed for investigating material removal patterns.
AB - The present experimental work is carried out on SAE 420 steel to optimize process parameters of low-power laser hardening to improve surface micro-hardness and wear resistance for dry sliding for bio-medical applications. Laser power is the most significant factor for micro-hardening and wear resistance. Rank two for scanning speed and three for standoff distance, respectively. The experiments show that the surface micro-hardness of treated samples varies from 711 to 833 Vickers Pyramid Number by optimized process parameters such as laser beam power of 300 W, laser scan speed of 1.0 mm/s, and standoff distance of 225 mm. In comparison, the base material micro-hardness is 208 Vickers Pyramid Number as the predictive equation generated for finding micro-hardness value for the above three laser hardening process parameters. The dry sliding wear test is conducted on all laser-treated samples and a comparison is made with the untreated sample. A significant improvement in wear resistance was observed for treated as compared to untreated samples. The wear of laser hardened sample of SAE 420 steel was 3.67 x10-9 g/cm compared to untreated base metal wear rate of 139.00 x 10-9 g/cm at an applied load of 30 N and sliding speed of 300 revolutions per minute. The scanning electron microscopy analysis of wear samples (untreated, treated maximum, and minimum hardness) is observed for investigating material removal patterns.
UR - https://www.scopus.com/pages/publications/85189095761
UR - https://www.scopus.com/pages/publications/85189095761#tab=citedBy
U2 - 10.1016/j.jmrt.2024.03.153
DO - 10.1016/j.jmrt.2024.03.153
M3 - Article
AN - SCOPUS:85189095761
SN - 2238-7854
VL - 30
SP - 1611
EP - 1619
JO - Journal of Materials Research and Technology
JF - Journal of Materials Research and Technology
ER -