On the mechanism of quench cracking in Rene 95 nickel-based superalloy

The mechanism of quench cracking in the nickel-based superalloy Rene 95 has been investigated. Rapid cooling of notched tensile bars loaded with fixed grips was used to mimic a quench. Failures occurred by brittle intergranular fracture in air, but by rupture and at higher stress in vacuum. The brit...

Full description

Saved in:
Bibliographic Details
Published in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2005-08, Vol.402 (1), p.42-46
Main Authors: Kane, W.M., Krupp, U., Jacobs, T., McMahon, C.J.
Format: Article
Language:English
Subjects:
Applied sciences
Dynamic embrittlement
Exact sciences and technology
Fractures
Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology
Metals. Metallurgy
Nickel plating
Quench cracking
Rene 95
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The mechanism of quench cracking in the nickel-based superalloy Rene 95 has been investigated. Rapid cooling of notched tensile bars loaded with fixed grips was used to mimic a quench. Failures occurred by brittle intergranular fracture in air, but by rupture and at higher stress in vacuum. The brittle intergranular fracture in air was recognized as dynamic embrittlement. Nickel-plating of sufficient thickness was found to eliminate cracking when Rene 95 was water-quenched from above the γ′ solvus temperature.
ISSN:0921-5093
1873-4936
DOI:10.1016/j.msea.2005.05.032