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Preliminary design and evaluation of oxide/stainless steel functionally graded materials and their properties
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Shenzhen Research Institute of Central South University,Shenzhen Research Institute of Central South University,Shenzhen Research Institute of Central South University

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The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan)

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    Abstract:

    A Y2Ti2O7/316L stainless steel functionally graded composite material was fabricated through powder lamination and hot-press sintering processing, and its microstructure and some mechanical properties were investigated. The observations of optical microscopy, X-ray diffractometry, and electron probe microanalysis all confirmed the formation of compositional and microstructural gradients in the transition region between the metal and oxide halves. Some mechanical properties of the graded composite were also preliminarily evaluated, by performing the mechanical testing on homogeneous composite samples with different volume fractions of Y2Ti2O7. The results suggested that some mechanical properties vary in the same gradient of composition and microstructure, i.e. relative density and bending strength increase gradually while Vickers hardness decreases gradually with the increase of metal content in the transition region.

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[HE Cen, JIANG Yong, LUO Si Jie. Preliminary design and evaluation of oxide/stainless steel functionally graded materials and their properties[J]. Rare Metal Materials and Engineering,2018,47(10):3155~3160.]
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History
  • Received:November 28,2016
  • Revised:August 02,2018
  • Adopted:January 06,2017
  • Online: November 08,2018
  • Published: