Fatigue Life Comparison of SCM 420 Steel with Oil Quenching and AlCrTiSiN Coating
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Abstract
This research aimed to evaluate the fatigue life of shafts made from low - carbon alloy steel JIS – SCM 420 by comparing specimens treated with oil quenching and those coated with AlCrTiSiN. The surface roughness and coating thickness were measured, and fatigue tests were conducted using an R.R. Moore fatigue testing machine. The testing results showed that the average surface roughness (Ra) of the oil - quenched specimens was 1.089 µm, whereas the AlCrTiSiN - coated specimens exhibited a lower surface roughness of 0.322 µm. The hardness of the AlCrTiSiN - coated specimens was 190.8 HB, which was higher than that of the oil - quenched layer at 67 HB. The increased hardness resulted from the addition of silicon, which refined the grain boundaries. The maximum fatigue cycles obtained were 1,841,537 cycles for the AlCrTiSiN - coated specimens and 1,521,942 cycles for the oil - quenched specimens, representing a 21% difference. It was concluded that the AlCrTiSiN - coated specimens showed a longer fatigue life compared to the oil-quenched specimens.
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References
เจษฎา รุจิสมนภา, “พฤติกรรมการสึกหร่อของดอกกัดที่เคลือบผิวด้วยชั้นเคลือบโดยวิธีไอระเหยทางฟิสิกส์,” วิทยานิพนธ์ของการศึกษาตามหลักสูตรปริญญาวิศวกรรมศาสตรมหาบัณฑิต สาขาวิชาวิศวกรรมโลหการ มหาวิทยาลัยเทคโนโลยีสุรนารี, 2556.
Nurot Panich, Surasak Surinphong, D.A. Karpov, Yong Kwang Tan, Chin Foo Goh, Jan Ma, “ “Mechanical Properties “Mechanical Properties of AlCrTiSiN Coatings Developed by Cathodic Arc for Protection Applications.” Solid State Phenomena, vol. 185, 2012, pp. 81-83.
INTERNATIONAL STANDARD ISO 1143. (2025, October 20). Metallic materials - Rotating bar bending fatigue testing [Online]. Available: https://cdn.standards.iteh.ai/samples/79575/71ce80272d3a4ce4920ea96f0a7894df/ISO-1143-2021.pdf
Otai Special Steel. (2024, October 20). ASTM 4118 Steel | SCM420 | 18CrMo4 | 1.7243 [Online]. Available: https://www.astmsteel.com/product/astm-4118-steel-scm420-18crmo4-1-7243/
Mohammad Jamalkhani Khameneh, Mohammad Azadi, “Evaluation of high-cycle bending fatigue and fracture behaviors in EN-GJS700-2 ductile cast iron of crankshafts.” Engineering Failure Analysis, vol. 85, 2018, pp. 189-200.
Sajjad Seifoori, Ahmad Mahdian Parrany, Mojtaba Khodayari, “A high-cycle fatigue failure analysis for the turbocharger shaft of BELAZ 75131 mining dump truck,” Engineering Failure Analysis, vol.116, 2020, pp. 104752.
Libin Zang, Yong Chen, Weijie Hou, Tao Sun, Yimin Wu, Baoshan Zhao, “Effect of manganese phosphate conversion coating with different crystal sizes on fatigue life of 20MnCrS5 steel helical gears,” Tribology International, vol. 186, 2023, pp. 108622.
Suresh Mylsamy, Neelakrishnan Subramanyan, “Fatigue failure prediction through factor of safety and stress concentration in a malfunctioned AISI 4140 automotive crankshaft,” Materials Research Express, vol. 10, 2023, pp. 126516.
