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Experimental Procedure for Warm Spinning of Cast Aluminum Components
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Progress in cold roll bonding of metals.

Long Li1, Kotobu Nagai1, Fuxing Yin1

  • 1Innovative Materials Engineering Laboratory, National Institute for Materials Science, Tsukuba 305-0047, Japan.

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Summary

Cold roll bonding (CRB) is a key solid-state joining method for creating layered composite materials. Optimal bonding requires sufficient deformation and meticulous surface preparation, with film theory explaining the primary mechanism.

Keywords:
bond strengthbonding mechanismcold roll bondingsurface preparationthreshold reduction

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Area of Science:

  • Materials Science
  • Manufacturing Engineering
  • Solid-State Bonding

Background:

  • Layered composite materials are crucial for industrial applications.
  • Cold roll bonding (CRB) is a widely adopted solid-state process for manufacturing these materials at room temperature.
  • This paper reviews CRB technology for fabricating layered composites.

Approach:

  • Analyzes the impact of process parameters, including surface preparation, on bonding.
  • Investigates the critical deformation reduction threshold for achieving interlayer bonding.
  • Examines surface cleaning techniques like degreasing and scratch brushing for enhanced bonding.

Key Points:

  • Bonding occurs when deformation reduction surpasses a specific threshold.
  • Effective surface preparation, including degreasing and mechanical brushing, is vital for satisfactory bonds.
  • The film theory is identified as the predominant bonding mechanism in CRB.
  • Metals with a BCC crystal structure bond more readily than FCC or HCP metals.
  • The hardness of metals significantly influences the CRB process.

Conclusions:

  • CRB is a suitable technology for fabricating layered composite materials.
  • Understanding process parameters and bonding mechanisms is essential for optimizing CRB.
  • Future developments in CRB hold potential for advanced material applications.