Standard Method for X-Ray Stress Measurement in Ferritic Steels Using Cosα Method
(JSMS-SD-18-24)

Editors

Y. Sakaida, K. Suzuki, and K. Tanaka
Committee on X-Ray Study for Mechanical Behavior of Materials at the Society of Materials Science, Japan

Publication

November 2024

Style

A4 size, 25 pages

Price

11,000 JPY, ＋Actual shipping cost

Overview of this standard

In recent years, the cosα method has attracted attention as an alternative technique for measuring applied and residual stresses faster and without loss of accuracy. The principle of the cosα method was first proposed by S. Taira, K. Tanaka, and T. Yamasaki at Kyoto University in 1978. The cosα method utilizes the strain information in the entire Debye-Scherrer ring recorded by an area detector under a single short-duration X-ray exposure at an oblique angle. The stress value is determined from the slope of the graph of the strain parameter versus cosα. In 2015, a subcommittee was set up under the X-Ray Committee in JSMS for the standardization of the cosα method. In 2020, we published the Japanese JSMS-Standard, “Standard Method for X-Ray Stress Measurement in Ferritic Steels Using Cosα Method (JSMS-SD-14-20)”.
As the cosα method has been adopted by more than 500 facilities around the world, we have published the English edition of the JSMS-Standard to provide a worldwide standard protocol for the accurate X-ray measurement of stress using the cosα method. We hope that this English-version standard will be used by researchers and engineers working in the field of stress measurements all over the world.

Contents of standard

  1. General provision
  2. General items of the cosα method
  3. Standard method of stress measurement in ferritic steels
  4. Addendum
  5. Bibliography

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