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Iranian Journal of Materials Forming، جلد ۱۲، شماره ۱، صفحات ۳۷-۵۰
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عنوان انگلیسی Tribology Characteristics of Ultrasonic Impact Treated Co-Based L-605 Superalloy
چکیده انگلیسی مقاله This study investigates the effect of ultrasonic impact treatment (UIT) on the surface structure, microhardness, and tribological behavior of L-605 superalloy. The surface of the samples was impacted by a high-frequency (20 kHz) spherical tungsten carbide tool for one, two, three, and five passes, using a feed rate of 0.08 mm/min, vibration amplitude of 28 %, and static pressure of 0.1 MPa. Results showed that UIT significantly deformed the surface microstructure and enhanced surface microhardness, primarily due to work hardening, strain-induced martensitic transformation, and ultrafine grain formation. A single UIT pass notably improved wear resistance and reduced the friction coefficient. Compared to the annealed alloy, the one-pass UITed samples showed wear rate reductions of 74%, 70%, 68%, and 64% under loads of 5, 10, 25, and 75 N, respectively. The average friction coefficient also dropped by up to 80% at 10 N and 74% at 75 N. Additional UIT passes resulted in marginal microhardness improvement, likely due to strain hardening saturation in the surface layers.
کلیدواژه‌های انگلیسی مقاله L-605 alloy,ultrasonic impact treatment,sliding wear,friction,tribology
نویسندگان مقاله R. Nemati |
Department of Metallurgy and Materials Science, Imam Khomeini International University, Qazvin, Iran

R. Taghiabadi |
Department of Metallurgy and Materials Science, Imam Khomeini International University, Qazvin, Iran

M. Saghafi Yazdi |
Department of Metallurgy and Materials Science, Imam Khomeini International University, Qazvin, Iran

S. Amini |
Faculty of Mechanical Engineering, Department of Mechanical Engineering, Manufacturing and Production, University of Kashan, Kashan, Iran

نشانی اینترنتی https://ijmf.shirazu.ac.ir/article_8041_5950ff49f9e0a744f93027de2d766055.pdf
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