Application of Diffraction-Amalgamated Grain Boundary Tracking to Fatigue crack propagation behavior in high strength aluminum alloy

Hui Li, Hiroyuki Toda, Kentaro Uesugi, Akihisa Takeuchi, Yoshio Suzuki, Masakazu Kobayashi

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Fatigue crack propagation behavior in a 7075-type Al alloy (Al-5.6%Zn-2.5%Mg-1.6%Cu) was investigated by applying Diffraction-Amalgamated Grain Boundary Tracking (DAGT), which provides grain morphologies and crystallographic orientations in three dimensions (3D). 3D crack morphologies at different propagation stages in the bulk of the sample were successfully obtained using synchrotron radiation X-ray microtomography (SRCT) technique. The apparent crack growth rate, da/dN, which varies significantly along a crack front line, was calculated. There are rapid acceleration and deceleration regions of da/dN due to the interaction with grain boundary (GB) and crack closure segments. Typical crack morphology under the influence of Mode II (in-plane shear) and Mode III (out-of-plane shear), such as crack deflection and twist, is detected by the observation of 2D tomographic slice image. A detailed direct assessment of microstructure-crack interaction behaviors has been achieved by applying the DAGT technique.

Original languageEnglish
Pages (from-to)424-428
Number of pages5
JournalMaterials Transactions
Volume56
Issue number3
DOIs
Publication statusPublished - Jan 1 2015

Fingerprint

high strength alloys
High strength alloys
crack propagation
Fatigue crack propagation
aluminum alloys
Aluminum alloys
Grain boundaries
cracks
grain boundaries
Diffraction
Cracks
diffraction
Crack closure
crack closure
shear
Deceleration
Synchrotron radiation
deceleration
Crack propagation
deflection

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Application of Diffraction-Amalgamated Grain Boundary Tracking to Fatigue crack propagation behavior in high strength aluminum alloy. / Li, Hui; Toda, Hiroyuki; Uesugi, Kentaro; Takeuchi, Akihisa; Suzuki, Yoshio; Kobayashi, Masakazu.

In: Materials Transactions, Vol. 56, No. 3, 01.01.2015, p. 424-428.

Research output: Contribution to journalArticle

Li, Hui ; Toda, Hiroyuki ; Uesugi, Kentaro ; Takeuchi, Akihisa ; Suzuki, Yoshio ; Kobayashi, Masakazu. / Application of Diffraction-Amalgamated Grain Boundary Tracking to Fatigue crack propagation behavior in high strength aluminum alloy. In: Materials Transactions. 2015 ; Vol. 56, No. 3. pp. 424-428.
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