1
Chair of Mechanical Engineering, University of Leoben
2
School of Mechanical Engineering, Sharif University of Technology
3
Mechanical Engineering, Sharif University of Technology
Abstract
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.
Eichlseder, W., Winter, G., Farrahi, G. H., & Azadi, M. (2013). The Effect of Various Parameters on Out-of-phase Thermo-mechanical Fatigue Lifetime of A356.0 Cast Aluminum Alloy. International Journal of Engineering, 26(12), 1461-1470.
MLA
W Eichlseder; G Winter; G. H. Farrahi; M. Azadi. "The Effect of Various Parameters on Out-of-phase Thermo-mechanical Fatigue Lifetime of A356.0 Cast Aluminum Alloy". International Journal of Engineering, 26, 12, 2013, 1461-1470.
HARVARD
Eichlseder, W., Winter, G., Farrahi, G. H., Azadi, M. (2013). 'The Effect of Various Parameters on Out-of-phase Thermo-mechanical Fatigue Lifetime of A356.0 Cast Aluminum Alloy', International Journal of Engineering, 26(12), pp. 1461-1470.
VANCOUVER
Eichlseder, W., Winter, G., Farrahi, G. H., Azadi, M. The Effect of Various Parameters on Out-of-phase Thermo-mechanical Fatigue Lifetime of A356.0 Cast Aluminum Alloy. International Journal of Engineering, 2013; 26(12): 1461-1470.