TY - JOUR
T1 - Photothermal, Structural, and Microstructural Characterization of SAE4320H Automotive Steel
AU - Lara-Guevara, Alberto
AU - Rojas-Rodríguez, Ignacio
AU - Velazquez-Hernandez, Ruben
AU - Jaramillo-Vigueras, David
AU - del Ángel-Sánchez, Karina
AU - Rodríguez-García, Mario E.
N1 - Publisher Copyright:
© 2017, ASM International.
PY - 2017/5/1
Y1 - 2017/5/1
N2 - SAE4320H steel was characterized by photothermal radiometry spectroscopy, scanning electron microscopy, x-ray diffraction, and Vickers microhardness, to study metallurgical property changes as a result of the annealing heat treatment. Photothermal radiometry (PTR) images of hot forged and annealed SAE4320H steel were obtained to study the thermal changes, as a consequence of metallurgical microstructure changes that were produced by the heat treatment conditions. X-ray diffraction showed that the annealing process improves the crystalline quality of the SAE4320H steel and releases of any thermal stress. Widmanstatten microstructure was identified as a typical structure after the forging process. The Widmanstatten is a metallographic microstructure transformation to ferrite and pearlite which affected SAE4320H steel hardness and thermal properties. Vickers test showed that the hardness decreases as a result of the annealing process. A positive correlation between Vickers microhardness and PTR amplitude images was found, indicating that the annealing process increases the PTR signal. This methodology allows the determination of the changes in the Vickers microhardness from a non-contact and remote method as in PTR.
AB - SAE4320H steel was characterized by photothermal radiometry spectroscopy, scanning electron microscopy, x-ray diffraction, and Vickers microhardness, to study metallurgical property changes as a result of the annealing heat treatment. Photothermal radiometry (PTR) images of hot forged and annealed SAE4320H steel were obtained to study the thermal changes, as a consequence of metallurgical microstructure changes that were produced by the heat treatment conditions. X-ray diffraction showed that the annealing process improves the crystalline quality of the SAE4320H steel and releases of any thermal stress. Widmanstatten microstructure was identified as a typical structure after the forging process. The Widmanstatten is a metallographic microstructure transformation to ferrite and pearlite which affected SAE4320H steel hardness and thermal properties. Vickers test showed that the hardness decreases as a result of the annealing process. A positive correlation between Vickers microhardness and PTR amplitude images was found, indicating that the annealing process increases the PTR signal. This methodology allows the determination of the changes in the Vickers microhardness from a non-contact and remote method as in PTR.
KW - annealing
KW - gear manufacturing
KW - metallurgical microstructure
KW - microhardness
KW - photothermal radiometry
UR - http://www.scopus.com/inward/record.url?scp=85016401225&partnerID=8YFLogxK
U2 - 10.1007/s11665-017-2633-7
DO - 10.1007/s11665-017-2633-7
M3 - Artículo
SN - 1059-9495
VL - 26
SP - 2040
EP - 2046
JO - Journal of Materials Engineering and Performance
JF - Journal of Materials Engineering and Performance
IS - 5
ER -