influence of Heat Treatment on The Mechanical Properties and Damage Development in A SiC/Ti-15-3 MMC  

Oleh:

Miller, David A. ; Lagoudas, Dimitris C.

Jenis: Article from Bulletin/Magazine
Dalam koleksi: Journal of Engineering Materials and Technology vol. 122 no. 1 (2000), page 74-79.
Topik: heat treatment; heat treatment; mechanical properties; damage; development

Ketersediaan

Perpustakaan Pusat (Semanggi) Nomor Panggil: JJ87.1 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

Lihat Detail Induk

Isi artikel

Titanium alloys are commonly heat - treated to meet specific design requirements. In an effort to possibly create a better composite, the influence of heat treatments on the damage evolution and strength of a SiC / Ti - 15 - 3 metal matrix composite (MMC) was studied. Heat treatments of 450° C and 700° C for 24 hours were performed on axial and transverse unidirectional specimens. These specimens, in addition to specimens in the as - received condition, were tested under nonproportional loading paths and then microstructurally analyzed to determine the induced damage. The axial composite with the 450° C heat treatment showed the highest elastic modulus and the lowest stiffness reduction than the other heat treatment conditions. The transverse composite in the as - received condition showed the highest room temperature elastic modulus and the lowest stiffness reduction compared with other heat treatment conditions. Typical damage modes of Ti MMC's, such as fiber / matrix debonding and matrix microcracking, were seen in all heat treatments. A micromechanics model based on the Mori - Tanaka averaging scheme was implemented to simulate the effects of micro - cracking induced damage on composite stiffness reduction.

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