Structural Effects of Heat Treatment Holding-Time on Dynamic and Damping Behaviour of an Fe-28Mn-6Si-5Cr Shape Memory Alloy

  • Mihai POPA ”Gheorghe Asachi” Technical University of Iaşi, Romania
  • Bogdan PRICOP ”Gheorghe Asachi” Technical University of Iaşi, Romania
  • Bogdan ISTRATE ”Gheorghe Asachi” Technical University of Iaşi, Romania
  • Florin POPA Technical University of Cluj-Napoca, Romania
  • Viorel GOANȚĂ ”Gheorghe Asachi” Technical University of Iaşi, Romania
  • Leandru Gheorghe BUJOREANU ”Gheorghe Asachi” Technical University of Iaşi, Romania
Keywords: FeMnSiCr shape memory alloys, martensite, strain sweep dynamic mechanical analysis, internal friction, anti-seismic damper


The paper reports the structural effects of holding time period, during heat treatment, on the dynamic and damping behavior of a Fe-28Mn-6Si-5Cr (mass. %) shape memory alloy. After casting and hot rolling, solution treatment at 1050 oC was applied for five holding times, 2, 4, 6, 8 and 10 hours, followed by water quenching. The specimens were analyzed by scanning electron microscopy and X-ray diffraction which emphasized that only the 2-hours solution treated specimens contained ε-hexagonal close packed (hcp) martensite and experienced the highest internal friction value. These specimens were tested on a special device which transformed both tension and compression into tensile strain applied to the specimens and proved to be a promising solution for anti-seismic damper.

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How to Cite
POPA M, PRICOP B, ISTRATE B, POPA F, GOANȚĂ V, BUJOREANU LG. Structural Effects of Heat Treatment Holding-Time on Dynamic and Damping Behaviour of an Fe-28Mn-6Si-5Cr Shape Memory Alloy. The Annals of “Dunarea de Jos” University of Galati. Fascicle IX, Metallurgy and Materials Science [Internet]. 15Mar.2021 [cited 22Sep.2021];44(1):5-0. Available from: