Abstract
The effect of grain size on tensile and fatigue properties has been investigated in cast Mg alloys of Mg-2.98Nd-0.19Zn (1530 μm) and Mg-2.99Nd-0.2Zn-0.51Zr (41 μm). The difference between RB and push–pull fatigue testing was also evaluated in both alloys. The NZ30K05-T6 alloy shows much better tensile strengths (increased by 246 pct in YS and 159 pct in UTS) and fatigue strength (improved by ~80 pct) in comparison with NZ30-T6 alloy. RB fatigue testing results in higher fatigue strength compared with push–pull fatigue testing, mainly due to the stress/strain gradient in the RB specimen cross section. The material with coarse grains could be hardened more in the cyclic loading condition than in the monotonic loading condition, corresponding to the lower σ f and the higher σ f/σ b or σ f/σ 0.2 ratio compared to the materials with fine grains. The fatigue crack initiation sites and failure mechanism are mainly determined by the applied stress/strain amplitude. In LCF, fatigue failure mainly originates from the PSBs within the surface or subsurface grains of the samples. In HCF, cyclic deformation and damage irreversibly caused by environment-assisted cyclic slip is the crucial factor to influence the fatigue crack. The Coffin–Manson law and Basquin equation, and the developed MSF models and fatigue strength models can be used to predict fatigue lives and fatigue strengths of cast magnesium alloys.
Similar content being viewed by others
References
A.I. Taub, P.E. Krajewski, A.A. Luo, and J.N. Owens: JOM (Journal of Metals), 2007, vol. 59, pp. 48-57.
A.A. Luo: Int. Mater. Reviews, 2004, vol. 49, pp. 13-30.
S. Begum, D.L. Chen, S. Xu, and A.A. Luo: Metall. Mater. Trans. A, 2008, vol. 39, pp. 3014-26.
S. Begum, D.L. Chen, S. Xu, and A.A. Luo: Int. J. Fatigue, 2009, vol. 31, pp. 726-35.
Q.Z. Li, Q Yu, J.X. Zhang, and Y.Y. Jiang: Scripta Mater., 2010, vol. 62, pp. 778-81.
6. K. Gall, M.F. Horstemeyer, B.W. Degner, D.L. McDowell, and J. Fan: Int. J. Fract., 2001, vol. 108, pp. 207-33.
7. D.K. Xu, L. Liu, Y.B. Xu, and E.H. Han: Scripta Mater., 2007, vol. 56, pp. 1-4.
8. H. Mayer, M. Papakyriacou, B. Zettl, and S.E. Stanzl-Tschegg: Int. J. Fatigue, 2003, vol. 25, pp. 245-56.
9. M.F. Horstemeyer, N. Yang, K. Gall, D.L. McDowell, J. Fan, and P.M. Gullett: Acta Mater., 2004, vol. 52, pp. 1327-36.
10. Z.M. Li, P.H. Fu, L.M. Peng, Y.X. Wang, H.Y. Jiang, and G.H. Wu: Mater. Sci. Eng. A, 2013, vol. 579, pp. 170-9.
11. Z.M. Li, Q.G. Wang, A.A. Luo, L.M. Peng, P.H. Fu, and Y.X. Wang. Mater. Sci. Eng. A, 2013, vol. 582, pp. 170-7.
12. Q.G. Wang, C.J. Davidson, J.R. Griffiths, and P.N. Crepeau: Metall. Mater. Trans. B, 2006, vol. 44, pp. 887-95.
13. Q.G. Wang and P.E. Jones: Metall. Mater. Trans. B, 2007, vol. 38, pp. 615-21.
14. D.K. Xu, L. Liu, B.Y. Xu, and E.H. Han: Acta Mater., 2008, vol. 56, pp. 985-94.
15. Q.G. Wang, D. Apelian, and D.A. Lados: J. Light Met., 2001, vol. 1, pp. 73-84.
16. P.S. De, R.S. Mishra, and C.B. Smith: Scripta Mater., 2009, vol. 60, pp. 500-3.
17. Z.M. Li, Q.G. Wang, A.A. Luo, P.H. Fu, L.M. Peng, Y.X. Wang, and G.H. Wu: Metall. Mater. Trans. A, 2013, vol. 44, pp. 5202-15.
18. Z.M. Li, P.H. Fu, L.M. Peng, E.P. Becker, and G.H. Wu: Mater. Sci. Eng. A, 2013, vol. 565, pp. 250-7.
19. L.M. Peng, P.H. Fu, Z.M. Li, H.Y. Yue, D.Q. Li, and Y.X. Wang: Mater. Sci. Eng. A, 2014, vol. 611, pp. 170-6.
20. L.M. Peng, P.H. Fu, Z.M. Li, Y.X. Wang, and H.Y. Jiang: J. Mater. Sci., 2014, vol. 49, pp. 7105-15.
21. Q.G. Wang, D. Apelian, and D.A. Lados: J. Light Met., 2001, vol. 1, pp. 85-97.
22. R.A. Siddiqui, S.A. Abdul-Wahab, and T. Pervez: Mater. Des., 2008, vol. 29, pp. 70-9.
23. M.E. Burba, M.J. Caton, S.K. Jha, and C.J. Szczepanski: Metal. Mater. Trans A, 2013, vol. 44, pp. 4954-67.
24. C.J. Davidson, J.R. Griffiths, and A.S. Machin: Fatigue Fract. Eng. Mater. Struct., 2002, vol. 25, pp. 223-30.
25. Z.M. Li, Q.G. Wang, A.A. Luo, L.M. Peng, and P. Zhang: Mater. Sci. Eng. A, 2015, vol. 647, pp. 113-26.
26. P.H. Fu, L.M. Peng, H.Y. Jiang, J.W. Chang, and C.Q. Zhai: Mater. Sci. Eng. A, 2008, vol. 486, pp. 183-92.
27. P.H. Fu, L.M. Peng, H.Y. Jiang, L. Ma, and C.Q. Zhai: Mater. Sci. Eng. A, 2008, vol. 496, pp. 177-88.
28. Z.M. Li, A.A. Luo, Q.G. Wang, L.M. Peng, P.H. Fu, and G.H. Wu: Mater. Sci. Eng. A, 2013, vol. 564, pp. 450-60.
29. J.W. Chang, L.M. Peng, X.W. Guo, A. Atrens, and P.H. Fu: J. Appl. Electrochem., 2008, vol. 38, pp. 207-14.
30. J.W. Chang, X.W. Guo, P.H. Fu, L.M. Peng, and W.J. Ding: Electrochim. Acta, 2007, vol. 52, pp. 3160-7.
31. J.W. Chang, P.H. Fu, X.W. Guo, and L.M. Peng: Corros. Sci., 2007, vol. 49, pp. 2612-27.
32. Z.M. Li, Q.G. Wang, A.A. Luo, P.H. Fu, and L.M. Peng: Inter. J. Fatigue, 2015, vol. 80, pp. 468-76.
33. Q.G. Wang and P. Jones: SAE Int. J. Mater. Manuf., 2011, vol. 4, pp. 289-97.
34. P.H. Fu, L.M. Peng, H.Y. Jiang, C.Q. Zhai, C.Q. Zhai, X. Gao, and J.F. Nie: Mater. Sci. Forum., 2007, vol. 546-549, pp. 97-100.
35. X.Z. Lin and D.L. Chen: Mater. Sci. Eng. A, 2008, vol. 496, pp. 106-13.
36. S.M. Yin, F. Yang, X.M. Yang, S.D. Wu, S.X. Li, and G.Y. Li: Mater. Sci. Eng. A, 2008, vol. 494, pp. 397-400.
37. L. Wu, A. Jain, D.W. Brown, G.M. Stoica, S.R. Agnew, B. Clausen, D.E. Fielden, and P.K. Liaw: Acta Mater., 2008, vol. 56, pp. 68-95.
38. X.Y. Lou, M. Li, P.K. Boger, S.R. Agnew, and R.H. Wagoner: Int. J. Plasti., 2007, vol. 23, pp. 44-86.
39. P.H. Fu, L.M. Peng, J.F. Nie, H.Y. Jiang, L. Ma, and L. Bourgeois: Mater. Sci. Forum., 2011, vol. 690, pp. 230-3.
40. C. Watanabe, R. Monzen, and K. Tazaki: Inter. J. Fatigue, 2008, vol. 30, pp. 635-41.
41. T.J. Marrow, A.A. Bin, I.N. Khan, S.M.A. Sim, and S. Torkamani: Mater. Sci. Eng. A, 2004, vol. 419, pp. 387-9.
42. F. Yang, F. Lv, X.M. Yang, S.X. Li, Z.F. Zhang, and Q.D. Wang: Mater. Sci. Eng. A, 2011, vol. 528, pp. 2231-8.
43. Y.J. Wu, R. Zhu, J.T. Wang and W.Q. Ji: Scripta Mater., 2010, vol. 63, pp. 1077-80.
44. S.E. Harvey, P.G. Marsh, and W.W. Gerberich: Acta Metall. Mater., 1994, vol. 42, pp. 3493-502.
45. J. Man, M. Petrenec, K. Obrtlík, and J. Polák: Acta Mater., 2004, vol. 52, pp. 5551-61.
46. J. Man, K. Obrtlík, C. Blochwitz, and J. Polák: Acta Mater., 2002, vol. 50, pp. 3767-80.
47. J. Polák, J. Man, T. Vystavel, and M. Petrenec: Mater. Sci. Eng. A, 2009, vol. 517, pp. 204-11.
48. Md.S. Bhuiyan, Y. Mutoh, T. Murai, and S. Iwakami: Int. J. Fatigue, 2008, vol. 30, pp. 1756-65.
49. D.L. Shu: The mechanical properties of engineering materials. China machine Press, Beijing, 2007.
Acknowledgments
This work was carried out as a collaborative research project supported by General Motors and Shanghai Jiao Tong University. This work was also supported by the Project Funded by China Postdoctoral Science Foundation (2015M571562). The authors are grateful to Drs. Yucong Wang and Anil Sachdev (GM) and Prof. Wengjiang Ding (SJTU) for their helpful discussions.
Author information
Authors and Affiliations
Corresponding author
Additional information
Manuscript submitted November 8, 2015.
Rights and permissions
About this article
Cite this article
Li, Z., Wang, Q., Luo, A.A. et al. Size Effect on Magnesium Alloy Castings. Metall Mater Trans A 47, 2686–2704 (2016). https://doi.org/10.1007/s11661-016-3436-4
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11661-016-3436-4