Laser Heat Treatment Of Iron-Base Alloys

D. S. Gnanamuthu; V. S. Shankar

doi:10.1117/12.946396

30 September 1985 Laser Heat Treatment Of Iron-Base Alloys

D. S. Gnanamuthu, V. S. Shankar

Proceedings Volume 0527, Applications of High Power Lasers; (1985) https://doi.org/10.1117/12.946396
Event: 1985 Los Angeles Technical Symposium, 1985, Los Angeles, United States

Abstract

Laser heat treatment of iron-base alloys is influenced by factors such as beam intensity profile, beam absorptance, heat conduction, and core microstructure of workpiece. In this article a number of techniques designed to improve the efficiency of laser heat treatment process are presented. Methods to obtain a laser beam profile with uniform intensity involves the use of beam integrating optics with Fresnel number higher than 10. Approaches to increase beam absorptance involve the use of infrared energy absorbing coatings or the use of linearly polarized laser beams. Numerical solution to the three-dimensional time-dependent heat conduction equation is used to calculate and experimentally validate the heat-affected and hardened zone profiles in finite length workpieces. The numerical solution uses an implicit time accurate finite difference procedure based on Newton iteration and triple approximate factorization. Core microstructure influences the hardened depth that can be obtained by laser heat treatment. This is due to the influence of carbon diffusion distance for a specific core microstructure, on the rate of structural transformation for surface hardening.

Citation Download Citation

D. S. Gnanamuthu and V. S. Shankar "Laser Heat Treatment Of Iron-Base Alloys", Proc. SPIE 0527, Applications of High Power Lasers, (30 September 1985); https://doi.org/10.1117/12.946396

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