Preliminary evaluation of a Ti-24. 5Al-17Nb/SiC composite

Journal Article · Thu Sep 15 00:00:00 EDT 1994 · Scripta Metallurgica et Materialia; (United States)

DOI:https://doi.org/10.1016/0956-716X(94)90205-4· OSTI ID:6981815

Krishnamurthy, S ^[1]; Smith, P R; Miracle, D B ^[2]

---

1. UES, Inc., Dayton, OH (United States)
2. Air Force Wright Lab., Wright-Patterson AFB, OH (United States)

Recent work on a new class of titanium aluminide composites with (O + [beta][sub 0]) or (O + [beta][sub 0] + [alpha][sub 2]) matrices containing the ordered [beta][sub 0] phase (CsCl structure based on [beta] Ti) and the ordered O phase (orthorhombic structure based on Ti[sub 2]AlNb) has shown significant improvements over the ([alpha][sub 2] + [beta]) matrix composites including reduced reactivity with the fiber, higher strength, and greater resistance to thermal fatigue and thermomechanical fatigue. With regard to the matrix alloys, the transition from Ti-24Al-11Nb to compositions near the orthorhombic phase such as Ti-22Al-23Nb and Ti-22Al-27Nb involves a large increase in the Nb content which leads to an increase in the density. The objective of this study was to evaluate the attributes of Ti-24.5Al-17Nb, an alloy with an intermediate Nb concentration, as a composite matrix material. It should be noted that this composition was previously developed as a monolithic alloy with improved toughness and it has shown interesting properties following thermomechanical processing.

• OSTI ID: 6981815
• Journal Information: Scripta Metallurgica et Materialia; (United States), Journal Name: Scripta Metallurgica et Materialia; (United States) Vol. 31:6; ISSN SCRMEX; ISSN 0956-716X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
ALLOYS
ALUMINIUM ALLOYS
CARBIDES
CARBON COMPOUNDS
COMPOSITE MATERIALS
FATIGUE
MATERIALS
MECHANICAL PROPERTIES
NIOBIUM ALLOYS
SILICON CARBIDES
SILICON COMPOUNDS
TENSILE PROPERTIES
TITANIUM ALLOYS
TITANIUM BASE ALLOYS