Mechanical Properties and Fracture Analysis of Mn-Rich Ni-Mn-Ga Polycrystalline Alloys

Abstract:

Article Preview

In present paper, the mechanical properties and fracturegraphs of Mn-rich polycrystalline alloys are investigated by compression tests and scanning electron microscope (SEM) observations. It is shown that the fracture strength and the rupture strain decrease with the increase of Mn content. It is suggested that the substitution of Mn for Ga reduces the ductility of Ni-Mn-Ga alloys. SEM observations of fracture surface show us typical intergranular crack. There are many little holes and micro-cracks on the grain boundary, which weakens the bond strength of grain boundary causing the intercrystalline cracking.

Info:

Periodical:

Key Engineering Materials (Volumes 324-325)

Edited by:

M.H. Aliabadi, Qingfen Li, Li Li and F.-G. Buchholz

Pages:

691-694

DOI:

10.4028/www.scientific.net/KEM.324-325.691

Citation:

F. Chen et al., "Mechanical Properties and Fracture Analysis of Mn-Rich Ni-Mn-Ga Polycrystalline Alloys", Key Engineering Materials, Vols. 324-325, pp. 691-694, 2006

Online since:

November 2006

Export:

Price:

$35.00

[1] V.A. Chernenko, E. Cesari, V.V. Kokorin and I.N. Vitenko: Scr. Metall. Mater. Vol. 33(1995), p.1239.

[2] K. Ullakko, J. K. Huang, C. Kantner, and R. C. O'Handle, V. V. Kokorin: Appl. Phys. Lett. Vol. 69(1996), p. (1966).

[3] A. Sozinov, A. A. Likhachev, N. Lanska and K. Ullakko: Appl. Phys. Lett. Vol. 80(2002), pp.1746-1748.

DOI: 10.1063/1.1458075

[4] R.C. O'Handley: J. Appl. Phys. Vol. 83(1998), p.3263.

[5] A.A. Likhachev, K. Ullakko: Phys. Lett. A. Vol. 275(2000).

In order to see related information, you need to Login.