Microstructure and mechanical properties of the L1{sub 2}/L2{sub 1} two-phase alloys in the quaternary Co-Al-Ni-Ti system

Book · Sat Jul 01 04:00:00 EDT 1995

OSTI ID:72562

Matano, Takeo; Kimura, Yoshisato; Miura, Seiji; Mishima, Yoshinao ^[1]

---

1. Tokyo Inst. of Technology, Yokohama (Japan)

An attempt is made to develop a two-phase alloy consisting of the L1{sub 2} and L2{sub 1}(Heusler) phases in the Co-Al-Ni-Ti quaternary system exhibiting a high elevated temperature strength as well as some room temperature ductility as a new class of heat resisting structural materials. The idea behind this approach is expectations for the L2{sub 1} phase to provide high elevated temperature strength, whereas the L1{sub 2} phase provides some room temperature ductility. Compositional optimization in the room temperature ductility of the L1{sub 2} (Co,Ni){sub 3}(Al,Ti) is first carried out and then, based on the result, several L1{sub 2}/L2{sub 1} two phase alloys are designed. It is found that a few to several per cent room temperature bend ductility is obtained in such two-phase alloys.

• OSTI ID: 72562
• Report Number(s): CONF-941144--; ISBN 1-55899-265-0
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
AMBIENT TEMPERATURE
COBALT ALLOYS
EXPERIMENTAL DATA
HEAT RESISTING ALLOYS
INTERMETALLIC COMPOUNDS
MECHANICAL PROPERTIES
MICROSTRUCTURE
NICKEL ALLOYS
QUATERNARY ALLOY SYSTEMS
TITANIUM ALLOYS
YIELD STRENGTH