About this Abstract |
Meeting |
2019 TMS Annual Meeting & Exhibition
|
Symposium
|
Characterization of Materials through High Resolution Imaging
|
Presentation Title |
Advances in Fatigue Crack Growth Characterization via In Situ Phase Contrast Tomography Imaging |
Author(s) |
Michael D. Sangid, Michael Waddell, Stephen Carter, Kevin Walker, Xianghui Xiao |
On-Site Speaker (Planned) |
Michael D. Sangid |
Abstract Scope |
In this work, in situ fatigue crack growth combined with x-ray synchrotron computed micro-tomography (μXSCT) characterization is used to observe and quantify three dimensional propagating fatigue cracks in two material systems. In AA7050-T7451, crack deflection at hard constituent particles is quantified, and a relationship is observed with the size of the constituent particle ahead of the crack tip and the maximum distance the crack path deflects to interact with the particle. The results are rationalized based on a stress field analysis. In the second material system, Ti-6Al-4V produced via selective laser melting is analyzed in various build conditions and processing conditions. Crack deflection based on grain structure and local porosity is observed, and paired with a stress field measurement in the vicinity of the advancing crack. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |