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...

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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
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description 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.
doi_str_mv 10.1016/j.msea.2005.05.032
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source ScienceDirect Journals
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
title On the mechanism of quench cracking in Rene 95 nickel-based superalloy
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