This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Effect of Temperature Cycle on Thermomechanical Fatigue Life of a High Silicon Molybdenum Ductile Cast Iron
Technical Paper
2015-01-0557
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
High silicon molybdenum (HiSiMo) ductile cast iron (DCI) is commonly used for high temperature engine components, such as exhaust manifolds, which are also subjected to severe thermal cycles during vehicle operation. It is imperative to understand the thermomechanical fatigue (TMF) behavior of HiSiMo DCI to accurately predict the durability of high temperature engine components. In this paper, the effect of the minimum temperature of a TMF cycle on TMF life and failure behavior is investigated. Tensile and low cycle fatigue data are first presented for temperatures up to 800°C. Next, TMF data are presented for maximum temperatures of 800°C and minimum cycle temperatures ranging from 300 to 600°C. The data show that decreasing the minimum temperature has a detrimental effect on TMF life. The Smith-Watson-Topper parameter applied at the maximum temperature of the TMF cycle is found to correlate well with out-of-phase (OP) TMF life for all tested minimum temperatures. Fractography and energy dispersive spectroscopy (EDS) are then performed on the tested specimens to determine the difference in failure mechanism as the minimum cycle temperature changes. Based on these observations, it appears that the segregation of magnesium to the grain boundary which occurs near 400°C in HiSiMo DCI influences TMF failure behavior when the TMF temperature cycle passes through 400°C.
Recommended Content
Authors
Citation
Avery, K., Pan, J., and Engler-Pinto, C., "Effect of Temperature Cycle on Thermomechanical Fatigue Life of a High Silicon Molybdenum Ductile Cast Iron," SAE Technical Paper 2015-01-0557, 2015, https://doi.org/10.4271/2015-01-0557.Also In
References
- Davis , J.R. ASM Specialty Handbook: Cast Iron ASM International 1996
- Goodrich , G.M. Iron Castings Engineering Handbook American Foundry Society 2003
- Elliott , R. Cast Iron Technology Butterworths 1988
- Li , D. , Perrin , R. , Burger , G. , McFarlan , D. et al. Solidification Behavior, Microstructure, Mechanical Properties, Hot Oxidation and Thermal Fatigue Resistance of High Silicon SiMo Nodular Cast Irons SAE Technical Paper 2004-01-0792 2004 10.4271/2004-01-0792
- Park , S. , Kim , J. , Kim , H. , Ko , S. et al. Development of a Heat Resistant Cast Iron Alloy for Engine Exhaust Manifolds SAE Technical Paper 2005-01-1688 2005 10.4271/2005-01-1688
- Sponseller , D.L , Scholz , W.G. and Rundle , D.F. Development of Low-Alloy Ductile Irons for Service at 1200-1500F American Foundry Society Trans. 76 353 368 1968
- Kupkovits , R.A. , Smith , D.J. and Neu , R.W. Influence of Minimum Temperature on the Thermomechanical Fatigue of a Directionally-Solidified Ni-Base Superalloy Procedia Engineering 2 1 687 696 2010 10.1016/j.proeng.2010.03.074
- Kirka , M. , Shinde , S.R. , Gravett , P.W. and Neu , R.W. Influence of Extremum Temperatures on TMF of a Ni-Base Superalloy Advanced Materials Research 891 892 1314 1319 2014 10.4028/www.scientific.net/AMR.891-892.1314
- Kobayashi , T. , Nishino , K. , Kimoto , Y. Awano , Y. et al. 673 K Embrittlement of Ferritic Spheroidal Graphite Cast Iron by Magnesium Journal of Japan Foundary Engineering Society 70 4 273 278 1998 10.11279/jfes.70.273
- Wu , X. , Quan , T. , and Sloss , C. Failure Mechanisms and Damage Model of Ductile Cast Iron under Low-Cycle Fatigue Conditions SAE Technical Paper 2013-01-0391 2013 10.4271/2013-01-0391
- ASTM E2368-10 Standard Practice for Strain-Controlled Thermomechanical Fatigue Testing American Society for Testing and Materials 2010
- ASTM E606-04 Standard Practice for Strain-Controlled Fatigue Testing American Society for Testing and Materials 2004
- Di Cocco , V. , Iacoviello , F. and Cavallini , M. Damaging Micromechanisms Characterization of a Ferritic Ductile Cast Iron Engineering Fracture Mechanics 77 11 2016 2023 2010 10.1016/j.engfracmech.2010.03.037
- Smith , K.N. , Watson , P. and Topper , T.H. A Stress-Strain Function for the Fatigue of Metals Journal of Materials 5 4 767 778 1970
- Heckel , T.K. and Christ , H.-J. Thermomechanical Fatigue of the TiAl Intermetallic Alloy TNB-V2 Experimental Mechanics 50 6 717 724 2010 10.1007/s11340-009-9264-3
- Buckholz , B. Harders , H. and Gampe , U. Thermo-Mechanical and Low Cycle Fatigue Behaviour of a Nickel-Base Superalloy at Elevated Temperatures Materials at High Temperatures 30 1 43 48 2013 10.3184/096034013X13629391701822