Effect of Hot Working on the High Cycle Fatigue Behavior of WE43 Rare Earth Magnesium Alloy
Monotonic and cyclic behavior of the alloy WE43 plates in two conditions is examined, with an emphasis on revealing microstructural features governing the differences in the behavior of the two plates. To facilitate the evaluation of the effect of hot working conditions on the behavior, the as-cast WE43 was converted into two rolled plates with one being rolled at a temperature for 16.5 °C higher than the other plate. The plates were further processed into the T5 condition. The T5 plate rolled at a lower temperature was found to have a higher strength and elongation to fracture in tension. Additionally, it exhibited superior high cyclic fatigue behavior at room and elevated temperatures. The interesting performance characteristics of the alloy in two conditions are rationalized in terms of their microstructures. The results reveal that it is possible to further optimize the hot working conditions to obtain the alloy exhibiting better performances.
KeywordsMagnesium alloys Microstructures Cyclic behavior High cycle fatigue
This research was sponsored by the US Army Research Laboratory and was accomplished under Cooperative Agreement Number W911NF-15-2-0084.
- 3.Aragones, J, Goundan, K, Kolp, S, Osborne, R, Ouimet, L, Pinch, W (2005). Development of the 2006 corvette z06 structural cast magnesium crossmember, SAE Technical Paper 2005-01-0340, 2005.Google Scholar
- 7.Cho, K, Sano, T, Doherty, K, Yen, C, Gazonas, G, Montgomery, J, Moy, P, Davis, B, DeLorme, R (2009). Magnesium technology and manufacturing for ultra lightweight armored ground vehicles, DTIC Document.Google Scholar
- 17.Sandlöbes, S, Pei, Z, Friák, M, Zhu, LF, Wang, F, Zaefferer, S, Raabe, D, Neugebauer, J (2014) Ductility improvement of mg alloys by solid solution: Ab initio modeling, synthesis and mechanical properties. AcMat 70(Supplement C):92–104.Google Scholar
- 31.Polesak, FJ, Davis, B, DeLorme, R, Agnew, SR (2016) Hot workability of alloy we43 examined using hot torsion testing. Magnesium technology 2011. Sillekens, WH, Agnew, SR, Neelameggham, NR, Mathaudhu, SN. Cham; Springer International Publishing:379–384.Google Scholar
- 34.(2015). Astm e8/e8m-15a. Standard Test Methods for Tension Testing of Metallic Materials. West Conshohocken, PA, ASTM International.Google Scholar