Flow stress model for IN718 accounting for evolution of strengthening precipitates during thermal treatment

• A flow stress model describing precipitate hardening in the nickel based alloy InconelÒ 718 following thermal treatment is presented. The interactions between precipitates and dislocations are included in a dislocation density based material model. Compression tests have been performed using solution annealed, fully-aged and half-aged material. Models were calibrated using data for solution annealed and fully-aged material, and validated using data from half-aged material. Agreement between experimental data and model predictions is good.

Subject headings

TEKNIK OCH TEKNOLOGIER  -- Materialteknik -- Annan materialteknik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Materials Engineering -- Other Materials Engineering (hsv//eng)

Keyword

Dislocations

Strengthening mechanisms

Metallic material

Mechanical testing

Numerical algorithms

Inconel 718

Gamma double prime

Material Mechanics

Publication and Content Type

ref (subject category)

art (subject category)