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Strong, lightweight article, containing a fine-grained metallic layer

  • US 7,803,072 B2
  • Filed: 08/06/2009
  • Issued: 09/28/2010
  • Est. Priority Date: 12/17/2004
  • Status: Expired due to Fees
First Claim
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1. A baseball bat having at least one metal, metal alloy or metal matrix composite layer on a metallic or non-metallic substrate, said layer having a thickness between 30 μ

  • m and 5 cm, said layer having a microstructure with an average grain size between 0.004 μ

    m and 10 μ

    m and said layer exhibiting a modulus of resilience in the range of 0.25 MPa and 25 MPa and an elastic limit ranging from 0.75% to 2.0%

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