Accession Number:

ADA210134

Title:

Laser Cladding of Ni, Nb, and Mg Alloys for Improved Environmental Resistance at High Temperature

Descriptive Note:

Final rept. Nov 1985-Oct 1988

Corporate Author:

ILLINOIS UNIV AT URBANA LASER AIDED MATERIALS PROCESSING LAB

Personal Author(s):

• Mazumder, J.
• Sircar, S.
• Kar, A.
• Ribaudo, C.
• Lober, R.
• Subramanian, R.

Report Date:

1989-01-01

Pagination or Media Count:

64.0

Abstract:

This report summarizes experimental and theoretical studies carried out during the period of November 1985 to October 1988 on laser surface modification of Nickel, Niobium, and Magnesium alloys for improved environmental resistance at high temperature. Major emphasis has been on Ni-Cr-Al-Hf system. Microstructural evolution and oxidation properties of Ni and Nb alloys were examined. For Mg alloys microstructural characterization and potentiodynamic corrosion testing were carried out. One-dimensional diffusion model for finite domain to examine the extended solid solubility in laser cladding was also developed.

Descriptors:

• *ALLOYS
• *CLADDING
• ENVIRONMENTS
• EXPERIMENTAL DATA
• MODIFICATION
• HIGH TEMPERATURE
• RESISTANCE
• ONE DIMENSIONAL
• THEORY
• SOLIDS
• MAGNESIUM ALLOYS
• LASERS
• SURFACES
• OXIDATION
• EVOLUTION(GENERAL)
• NIOBIUM
• NICKEL
• DIFFUSION
• SOLUBILITY
• MICROSTRUCTURE
• MODELS

Subject Categories:

• Metallurgy and Metallography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE