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International Journal of Engineering، جلد ۲۶، شماره ۱۲، صفحات ۱۴۶۱-۱۴۷۰
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عنوان انگلیسی The Effect of Various Parameters on Out-of-phase Thermo-mechanical Fatigue Lifetime of A356.0 Cast Aluminum Alloy
چکیده انگلیسی مقاله In this paper, the effect of various parameters on out-of-phase thermo-mechanical fatigue (OP-TMF) lifetime of A356.0 cast aluminum alloy is investigated. The studied parameters include maximum temperature, dwell time, and the thermo-mechanical loading factor. OP-TMF tests are conducted considering realistic running conditions of diesel engine cylinder heads. The maximum temperature varies between 200 to 275°C and the thermo-mechanical loading factor, which is the ratio of mechanical strain to thermal strain, is considered between 75 to 150%. The dwell time (or holding time) changes between 5 to 180 sec. at maximum temperature. The fracture surfaces of specimens are studied using Scanning electron microscope (SEM). These SEM images reveal that A356.0 alloy has a ductile behavior. The cyclic softening phenomenon is also observed during stress-strain hysteresis loops. The TMF tests results demonstrate that the dwell time bears no significant effect upon the lifetime. However, large influences for maximum temperature and the thermo-mechanical loading factor are depicted in the lifetime of A356.0 alloy.
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نویسندگان مقاله W Eichlseder |
Chair of Mechanical Engineering, University of Leoben

G Winter |
Chair of Mechanical Engineering, University of Leoben

G. H. Farrahi |
School of Mechanical Engineering, Sharif University of Technology

M. Azadi |
Mechanical Engineering, Sharif University of Technology

نشانی اینترنتی http://www.ije.ir/article_72216_6e0e2ddb2d30aa46a2cd848a7716b688.pdf
فایل مقاله اشکال در دسترسی به فایل - ./files/site1/rds_journals/409/article-409-2062815.pdf
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