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The influence of heat treatment atmosphere and maintaining period on the homogeneity degree of a Fe- Mn-Si-Cr-Ni shape memory alloy obtained through powder metallurgy

I. P. SPIRIDON1, B. PRICOP1,* , M. G. SURU1, A. L. PARASCHIV1, N. M. LOHAN1, L-G. BUJOREANU1

Affiliation

  1. Faculty of Materials Science and Engineering, The "Gheorghe Asachi" Technical University of Iaşi, Bd. D. Mangeron 61A, 700050 Iaşi, Romania

Abstract

An Fe-14Mn-6Si-9Cr-5Ni (mass. %) shape memory alloy obtained through powder metallurgy, containing a mixture of 50% commercial powders and 50% mechanical alloyed powders, was subjected to different heat treatments in order to increase chemical homogeneity degree. The heat treatments consisted of using three types of treatment atmospheres (air, nitrogen and argon) and three isothermal maintaining times (6 × 102 s, 24 × 102 s and 48 × 102 s). The obtained microstructures were then analysed by optical and scanning electron microscopy..

Keywords

Fe-Mn-Si shape memory alloys, Mechanical alloying, Powder metallurgy, Treatment atmosphere.

Submitted at: March 25, 2013
Accepted at: July 11, 2013

Citation

I. P. SPIRIDON, B. PRICOP, M. G. SURU, A. L. PARASCHIV, N. M. LOHAN, L-G. BUJOREANU, The influence of heat treatment atmosphere and maintaining period on the homogeneity degree of a Fe- Mn-Si-Cr-Ni shape memory alloy obtained through powder metallurgy, Journal of Optoelectronics and Advanced Materials Vol. 15, Iss. 7-8, pp. 730-733 (2013)