Development of a High Strength Isothermally Heat-Treated Nodular Iron Road Wheel Arm

Abstract

This report describes the redesign, material characterization, material selection, manufacture, and testing of a proposed road wheel arm for the M-1 tank. The material selected is bainitic ductile iron (BDI). This material, made by the casting process and heat-treatment, takes advantage of the toughness of bainite (acicular ferrite), the ability of the casting process to make a complex shape, and a 10 percent lighter than steel weight. A further advantage is its relatively low cost compared to a steel forging. A set of 14 road wheel arms were made and assembled. Dynamic tests on the design passed the 650,000 cycle specification, going beyond one million cycles. A 35 pound or 27 percent weight savings per arm was achieved, and based on figures obtained during the project, a considerable cost reduction can be effected. Keywords: Static tests; Stress analysis.

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Document Details

Document Type
Technical Report
Publication Date
Mar 31, 1985
Accession Number
ADA155755

Entities

People

  • A. R. Moore
  • L. Geer

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Chemistry
  • Contracts
  • Corporations
  • Cost Reductions
  • Dynamic Tests
  • Elastic Properties
  • Engineering
  • Hardness
  • Mechanical Properties
  • Mechanics
  • Modulus Of Elasticity
  • Notch Sensitivity
  • Physical Properties
  • Plastic Explosives
  • Strain Gages
  • Stresses
  • Tensile Strength

Fields of Study

  • Materials science

Readers

  • Exercise and Sports Science.
  • Metallurgy
  • Software Engineering