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Fabrication of porous NiTi alloy via powder metallurgy and its mechanical characterization by shear punch method

  • Powder Materials and Coatings
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Abstract

In this study, Porous NiTi shape memory alloy has been produced by mechanical alloying of the elemental Ni and Ti powders. The compacting process was done at two temperatures (warm and cold press) and then sintering at 980 and 1050°C was performed on the specimens. Microstructure and mechanical prop-erties of the samples were investigated by optical microscopy, scanning electron microscopy (SEM) and X-ray diffraction. Moreover, shear punch test (SPT) employed to investigate the effect of compaction pressure and sintering temperature on the mechanical properties of the fabricated samples. It was revealed that warm compaction/sintering resulted in 15% yield stress improvement and 20% ultimate tensile strength (UTS) enhancement with respect to conventionally produced specimens. The proposed approach in this paper seems a step forward towards fulfillment of the demand for heavy load-bearing artificial bone.

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Authors and Affiliations

  1. Department of Material Science and Engineering, Sharif University of Technology, P.O. Box: 11365-9466, Tehran, Iran

    Sorush Parvizi & Sayed Khatiboleslam Sadrnezhaad

  2. Department of Materials Science and Engineering, Tarbiat Modares University, P.O. Box: 14115-143, Tehran, Iran

    Vahid Hasannaeimi, Ehsan Saebnoori & Taghi Shahrabi

Authors
  1. Sorush Parvizi
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  2. Vahid Hasannaeimi
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  3. Ehsan Saebnoori
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  4. Taghi Shahrabi
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  5. Sayed Khatiboleslam Sadrnezhaad
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Correspondence to Sayed Khatiboleslam Sadrnezhaad.

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Parvizi, S., Hasannaeimi, V., Saebnoori, E. et al. Fabrication of porous NiTi alloy via powder metallurgy and its mechanical characterization by shear punch method. Russ. J. Non-ferrous Metals 53, 169–175 (2012). https://doi.org/10.3103/S1067821212020113

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