The effect of casting temperature on the fatigue properties of cast nickel aluminide alloys

Conference · Tue Jan 01 00:00:00 EST 1991

OSTI ID:5343227

Gieseke, B; Sikka, V K

The results of high cycle fatigue tests at 650{degree}C on several cast Ni{sub 3}Al alloys are reported and compared to cast IN-713C. These alloys include IC-221M and several variations to the IC-221M composition. The effect of casting temperature is investigated using castings poured at three different temperatures spanning a 56{degree}C range. The results show that IC-221M cast at the highest temperature has the best fatigue strength, exceeding that for IN-713C. In these alloys, crack initiation occurs at shrinkage microporosity and the effect of casting temperature on porosity is related to the observed differences in fatigue lives. 11 refs., 4 figs.

• Research Organization: Oak Ridge National Lab., TN (United States)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 5343227
• Report Number(s): CONF-910938-3; ON: DE92000432
• Resource Relation: Conference: International conference on high temperature aluminides and intermetallics, San Diego, CA (United States), 17-19 Sep 1991
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
TENSILE PROPERTIES
YIELD STRENGTH
CHROMIUM ALLOYS
INTERMETALLIC COMPOUNDS
MATERIALS TESTING
NICKEL BASE ALLOYS
CRACK PROPAGATION
FAILURES
FATIGUE
HIGH TEMPERATURE
ALLOYS
MECHANICAL PROPERTIES
NICKEL ALLOYS
TESTING
360103* - Metals & Alloys- Mechanical Properties