Journal of Materials Engineering and Performance

, Volume 14, Issue 5, pp 563–564

High-resolution methods for measuring the thermal expansion coefficient of aerospace materials

  • Gregory Wallace
  • William Speer
  • J. Ogren
  • Omar S. Es-Said
Testing And Evaluation
  • 62 Downloads

Abstract

Accurately predicting the coefficient of thermal expansion for many aerospace components is critical to ensure proper functionality on orbit where the temperature gradient across a spacecraft can vary from +300 °F to −450 °F. Under these conditions, the linear approximations generated by theoretical equations no longer hold true, and experimental methods are needed. Although several methods exist for measuring the coefficient of thermal expansion of materials, laser interferometry yields high-resolution results, and the technique is widely accepted in the scientific community.

Keywords

coefficient of thermal expansion (CTE) cryogenic experimental methods extreme temperatures isotropic material properties 

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Copyright information

© ASM International 2005

Authors and Affiliations

  • Gregory Wallace
    • 1
  • William Speer
    • 1
  • J. Ogren
    • 1
  • Omar S. Es-Said
    • 1
  1. 1.Mechanical Engineering DepartmentLoyola Marymount UniversityLos Angeles

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