A phase field study of stress effects on microstructure formation during laser-aided direct metal deposition process

Fikret Kh. Mirzade

doi:10.1117/12.2270122

26 June 2017 A phase field study of stress effects on microstructure formation during laser-aided direct metal deposition process

Fikret Kh. Mirzade

Author Affiliations +

Proceedings Volume 10330, Modeling Aspects in Optical Metrology VI; 103301C (2017) https://doi.org/10.1117/12.2270122
Event: SPIE Optical Metrology, 2017, Munich, Germany

Abstract

We present a phase-field model for predicting elastic effects on microstructure evolution at the process of laser sintering with powder injection. We derive a system of governing equations describing coupling effects among phase variable, concentration, thermal and elastic displacement fields based on the principle of entropy production positiveness, in which thermal and concentration expansions, mechanical anisotropy effects, transformation dilatation, and strain dependency on phase transformation are considered. The microstructure model is coupled with a macroscopic thermodynamic model. Effects of thermo-capillary and thermo-gravitation convections are included. The possibility to describe the process of structure formation at the phase interface during the melt crystallization is discussed. This model enables prediction and visualization of grain structures during and after the laser sintering process.

Citation Download Citation

Fikret Kh. Mirzade "A phase field study of stress effects on microstructure formation during laser-aided direct metal deposition process ", Proc. SPIE 10330, Modeling Aspects in Optical Metrology VI, 103301C (26 June 2017); https://doi.org/10.1117/12.2270122

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available