High temperature fatigue behaviour of intermetallics |
| |
Authors: | K Bhanu Sankara Rao |
| |
Affiliation: | (1) Mechanical Metallurgy Division, Indira Gandhi Centre for Atomic Research, 603 102 Kalpakkam, India |
| |
Abstract: | There would be considerable benefits in developing new structural materials where high use temperatures and strength coupled
with low density are minimum capabilities. Nickel and titanium aluminides exhibit considerable potential for near-term application
in various branches of modern industry due to the number of property advantages they possess including low density, high melting
temperature, high thermal conductivity, and excellent environmental resistance, and their amenability for significant improvment
in creep and fatigue resistance through alloying. Reliability of intermetallics when used as engineering materials has not
yet been fully established. Ductility and fracture toughness at room and intermediate temperatures continue to be lower than
the desired values for production implementation. In this paper, progress made towards improving strain-controlled fatigue
resistance of nickel and titanium aluminides is outlined. The effects of manufacturing processes and micro alloying on low
cycle fatigue behaviour of NiAl are addressed. The effects of microstructure, temperature of testing, section thickness, brittle
to ductile transition temperature, mean stress and environment on fatigue behaviour of same γ-TiAl alloys are discussed. |
| |
Keywords: | Nickel aluminides titanium aluminides low cycle fatigue microalloying |
本文献已被 SpringerLink 等数据库收录! |
|