Hostname: page-component-848d4c4894-nr4z6 Total loading time: 0 Render date: 2024-05-16T03:40:37.620Z Has data issue: false hasContentIssue false
  • English
  • Français

Excellent creep properties of Mg–Zn–Cu–Gd-based alloy strengthened by quasicrystals and Laves phases

Published online by Cambridge University Press:  01 May 2005

Guangyin Yuan ,
Hidemi Kato ,
Kenji Amiya  and
Akihisa Inoue
Guangyin Yuan*
Affiliation:
School of Materials Science and Engineering, Shanghai Jiaotong University, Shanghai 200030, People’s Republic of China; and Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
Hidemi Kato
Affiliation:
Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
Kenji Amiya
Affiliation:
Inoue Superliquid Glass Project, ERATO, Japan Science and Technology Corporation,Sendai 982-0807, Japan
Akihisa Inoue
Affiliation:
Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
*
a)Address all correspondence to this author. e-mail: gyyuan@sjtu.edu.cn
Get access

Abstract

A new type of Mg–Zn–Cu–Gd-based alloy strengthened by quasicrystal and Laves phase was developed. This alloy exhibits much better creep properties compared to AE42(Mg–4 wt% Al–2 wt% rare-earth) alloy, which is the benchmark creep-resistant magnesium die-casting alloy under the compressive creep condition of 180 °C and80 MPa. The new alloy also exhibits high room-temperature mechanical properties close to that of AZ91 alloy. The good mechanical properties are attributed to the special microstructure; the thermally stable icosahedral quasicrystals phase (i-phase) and Laves phase distributed along the grain boundary as a hard skeleton, and some fine β′1 precipitates distributed homogenously on the matrix. The dislocation morphology after the creep test was studied, and the strengthening mechanism was proposed.

Keywords

Mechanical propertiesMicrostructureQuasicrystal
Type
Articles
Information
Journal of Materials Research , Volume 20 , Issue 5 , May 2005 , pp. 1278 - 1286
Copyright
Copyright © Materials Research Society 2005

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1.Schumann, S. and Friedrich, H.: Current and future use of magnesium in the automobile industry. Mater. Sci. Forum 419–422, 51 (2003).CrossRefGoogle Scholar
2.Pekguleryuz, M.O. and Kaya, A.A.: Creep resistant magnesium alloys for powertrain applications. Adv. Eng. Mater. 5, 866 (2003).Google Scholar
3.Bettles, C.J. and Gibson, M.A.: Microstructural design for enhanced elevated temperature properties in sand-castable magnesium alloys. Adv. Eng. Mater. 5, 859 (2003).Google Scholar
4.Clark, J.B.: Age hardening in a Mg–9 wt% Al alloy. Acta Metall. 16, 141 (1968).CrossRefGoogle Scholar
5.Yuan, G., Amiya, K., Kato, H. and Inoue, A.: Structure and mechanical properties of cast quasicrystal-reinforced Mg–Zn–Al-Y base alloys. J. Mater. Res. 19, 1531 (2004).CrossRefGoogle Scholar
6.Pierce, F.S., Poon, S.J. and Guo, Q.: Electron localization in metallic quasicrystals. Science 261, 737 (1993).CrossRefGoogle ScholarPubMed
7.Halstead, A. and Rawlings, R.D.: The fracture behavior of two Co–Mo–Cr–Si wear resistant alloys (“Tribaloys”). J. Mater. Sci. 20, 1248 (1985).CrossRefGoogle Scholar
8.Wasikowska, A., Bartsch, M., Stein, F., Palm, M., Sauthoff, G. and Messerschmidt, U.: Plastic deformation of Fe-Al polycrystals strengthened with Zr-containing Laves phases, Part II. Mechanical Properties. Mater. Sci. Eng. A 381, 1 (2004).CrossRefGoogle Scholar
9.Elser, V.: Indexing problems in quasicrystal diffraction. Phys. Rev. B 32, 4892 (1985).CrossRefGoogle ScholarPubMed
10. ASTM X-Ray Powder Diffraction Data File 65-7003.Google Scholar
11.Liang, P., Seifert, H.J., Lukas, H.L., Ghosh, G., Effenberg, G. and Aldinger, F.: Thermodynamic modelling of the Cu–Mg–Zn ternary system. Calphad. 22, 527 (1998).CrossRefGoogle Scholar
12.Tsai, A.P., Niikura, A., Inoue, A., Masumoto, T., Nishita, Y., Tsuda, K. and Tanaka, M.: Highly ordered structure of icosahedral quasicrystals in Zn–Mg–RE (RE = rare earth metals) systems. Philos. Mag. Lett. 70, 169 (1994).CrossRefGoogle Scholar
13.Sturkey, L. and Clark, J.B.: Mechanism of age-hardening in magnesium-zinc alloys. J. Inst. Metals 88, 177 1959–1960.Google Scholar
14.Von Mises, R.: Mechanism of plastic deformation of crystal. Zeitschrift Für Ange Wandte Mechanik. 8, 161 (1928).Google Scholar