Microscale elastic strain evolution following damage in Ti-SiC composites

Jay C. Hanan*, Geoffrey A. Swift, Ersan Üstündag, Irene J. Beyerlein, Jonathan D. Almer, Ulrich Lienert, Dean R. Haeffner

*Bu çalışma için yazışmadan sorumlu yazar

Araştırma sonucu: Dergiye katkıMakalebilirkişi

8 Atıf (Scopus)

Özet

Fiber fractures are crucial in initiating damage zones that ultimately determine the strength and lifetime of fiber-reinforced metal matrix composites. The evolution of damage in a metal matrix composite (MMC) comprised of a row of unidirectional SiC fibers (32 vol pct) surrounded by a Ti matrix was examined, for the first time, using X-ray microdiffraction. Multiple strain maps including both phases were collected in situ under applied tensile stress. The elastic axial strains were then compared to predictions from a modified shear-lag model, which, unlike other shear-lag models, considers the elastic response of both constituents. The strains showed good correlation with the model. The results confirmed, for the first time, both the need and validity of this new model specifically developed for large scale multifracture simulations of MMCS. The results also provided unprecedented insight for the model, revealing the necessity of incorporating such factors as plasticity of the matrix, residual stress in the composite, and selection of the load sharing parameter.

Orijinal dilİngilizce
Sayfa (başlangıç-bitiş)3839-3845
Sayfa sayısı7
DergiMetallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Hacim33
Basın numarası12
DOI'lar
Yayın durumuYayınlandı - Ara 2002
Harici olarak yayınlandıEvet

Finansman

The authors are grateful to Dr. H. Deve, 3M Corp., for providing the specimens and helpful discussions about the properties of Ti-SiC composites. They also express their sincere gratitude to Dr. I.C. Noyan, IBM Watson Research Center, for the use of his stress fixture. This study was supported by the National Science Foundation (CAREER Grant No. DMR-9985264) at Caltech and a Laboratory-Directed Research and Development Project (No. 2000043) at Los Alamos. The work at the Advanced Photon Source was supported by the United States Department of Energy, Office of Basic Energy Sciences (Contract No. W-31-109-ENG-38).

FinansörlerFinansör numarası
Laboratory-Directed Research and Development Project2000043
Office of Basic Energy Sciences
United States Department of Energy
National Science FoundationDMR-9985264
Los Alamos National Laboratory

    Parmak izi

    Microscale elastic strain evolution following damage in Ti-SiC composites' araştırma başlıklarına git. Birlikte benzersiz bir parmak izi oluştururlar.

    Alıntı Yap