SYMPOSIA PAPER Published: 01 January 1953
STP41683S

Effect of a Notch and of Hardness on the Rupture Strength of “Discaloy”

Source

Certain critical components of jet engines and gas turbines, such as the turbine rotor, require materials of low notch sensitivity at service temperatures around 1200 F. In an Fe-Ni-Cr-Mo-Ti austenitic alloy of attractive basic properties, the effects of hardness as varied by the hardener, titanium, have been related to the behavior of the material in the presence of a notch. Creep-rupture and notched bar rupture tests were conducted at 1000 and 1200 F. The plain bar rupture strength reached a maximum at a hardener content producing 2 per cent rupture strain, and the notched bar strength exceeded the plain bar strength in material in which the creep specimen had more than 5 per cent rupture strain.

Author Information

Hull, F., C.
Westinghouse Electric Corp., Research Laboratories, East Pittsburgh, Pa
Hann, E., K.
Westinghouse Electric Corp., Research Laboratories, East Pittsburgh, Pa
Scott, H.
Westinghouse Electric Corp., Research Laboratories, East Pittsburgh, Pa
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Details
Developed by Committee: E04
Pages: 49–58
DOI: 10.1520/STP41683S
ISBN-EB: 978-0-8031-5920-4
ISBN-13: 978-0-8031-6074-3