ASTM E646
Full Name
ASTM E646 – Standard Test Method for Tensile Strain-Hardening Exponents (n -Values) of Metallic Sheet Materials
Scope
ASTM E646 outlines a method for determining the tensile strain-hardening exponent, commonly referred to as the n-value, of metallic sheet materials. This parameter is crucial for understanding the material’s formability and its response to plastic deformation.
Key aspects of ASTM E646 include:
- Specimen preparation: guidelines for preparing sheet metal specimens with specific dimensions.
- Tensile testing: conducting a tensile test to obtain a stress-strain curve.
- Data analysis: calculating the n-value from the stress-strain data using specific mathematical equations.
By determining the n-value, engineers and manufacturers can optimize forming processes, predict material behavior, and improve product quality.
Resources
Keywords
tensile strain-hardening exponent; n-value; metallic sheet materials; tensile testing; stress-strain curve; data analysis; formability; plastic deformation; material characterization; process optimization