Mechanical Properties of Steel Encapsulated Metal Matrix Composites

  • Sean Fudger
  • Eric Klier
  • Prashant Karandikar
  • Brandon McWilliams
  • Chaoying Ni


This research evaluates a coefficient of thermal expansion (CTE) mismatch induced residual compressive stress approach as a means of improving the ductility of metal matrix composites (MMCs). MMCs are frequently incorporated into advanced material systems due to their tailorable material properties. However, they often have insufficient strength and ductility for many structural applications. By combining MMCs with high strength steels in a hybridized, macro composite materials system that exploits the CTE mismatch, materials systems with improved strength, damage tolerance, and structural efficiency can be obtained. Macro hybridized systems consisting of steel encapsulated light metal MMCs were produced with the goal of creating a system which takes advantage of the high strength, modulus, and damage tolerance of steels and high specific stiffness and low density of MMCs while mitigating the high density of steels and the poor ductility of MMCs. Aluminum and magnesium based particulate reinforced MMCs combine many of the desirable characteristic of metals and ceramics, particularly the unique ability to tailor their CTE. This work aims to compare the performance of macro hybridized material systems consisting of aluminum or magnesium MMCs reinforced with Al2O3, SiC, or B4C particles and encapsulated by A36 steel, 304 stainless steel, or cold worked Nitronic® 50 stainless steels.


Encapsulation Metal Matrix Composite Residual Stress 


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Copyright information

© TMS (The Minerals, Metals & Materials Society) 2015

Authors and Affiliations

  • Sean Fudger
    • 1
    • 2
  • Eric Klier
    • 2
  • Prashant Karandikar
    • 3
  • Brandon McWilliams
    • 2
  • Chaoying Ni
    • 1
  1. 1.Department of Materials Science and EngineeringUniversity of DelawareNewarkUSA
  2. 2.Army Research Laboratory Building 4600Aberdeen Proving GroundUSA
  3. 3.M Cubed Technologies, Inc.NewarkUSA

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