In-situ radiation and mechanical testing
Plastic anisotropy and tension-compression asymmetry in nanotwinned Al–Fe alloys: An in-situ micromechanical investigation
Li, Qiang, Sichuang Xue, Yifan Zhang, Xing Sun, Haiyan Wang, and Xinghang Zhang. "Plastic anisotropy and tension-compression asymmetry in nanotwinned Al–Fe alloys: An in-situ micromechanical investigation." International Journal of Plasticity 132 (2020): 102760.
https://doi.org/10.1016/j.ijplas.2020.102760
Highlight: Systematic in-situ mechanical testing is conducted in an SEM revealing the anisotropy of a columnar nanotwinned Al-5Fe alloy. Tension-compression asymmetries show orientation dependence. These videos highlight both the compression and tension testing conducted along the in-plane directions
High-strength and tunable plasticity in sputtered Al–Cr alloys with multistage phase transformations
Li, Qiang, Zhongxia Shang, Xing Sun, Cuncai Fan, Ruizhe Su, Nicholas A. Richter, Zhe Fan et al. "High-strength and tunable plasticity in sputtered Al–Cr alloys with multistage phase transformations." International Journal of Plasticity 137 (2021): 102915.
https://doi.org/10.1016/j.ijplas.2020.102915
Highlight: Cr solute is found to segregate to grain boundaries in sputtered Cr alloys, lending to a amorphization at higher Cr content. Micropillar compression enables a mechanistic correlation between the microstructure and deformation. This video demonstrates shear banding in metallic glass (Al-21Cr).
In-situ high temperature micromechanical testing of ultrafine grained yttria-stabilized zirconia processed by spark plasma sintering
Cho, Jaehun, Jin Li, Q. Li, Jie Ding, Han Wang, S. Xue, T. B. Holland, A. K. Mukherjee, Haiyan Wang, and X. Zhang. "In-situ high temperature micromechanical testing of ultrafine grained yttria-stabilized zirconia processed by spark plasma sintering." Acta Materialia 155 (2018): 128-137.
https://doi.org/10.1016/j.actamat.2018.05.062
Highlight: This study probes the temperature dependent mechanisms of 3YSZ tested using in-situ micropillar compression. Martensitic transformations operate at lower temperatures and grain boundary dominated mechanisms occur at elevated temperatures. This video demonstrates the grain boundary dominant plasticity when 3YSZ is tested at 670C.
In situ nanoindentation of sustainable plasticity and work hardening in nanotwinned aluminum
D. Bufford, Y. Liu, J. Wang, H. Wang, and X. Zhang. "In situ nanoindentation study on plasticity and work hardening in aluminium with incoherent twin boundaries." Nature communications 5, no. 1 (2014): 1-9.
https://www.nature.com/articles/ncomms5864/#Sec12
Highlight: Demonstrates through in-situ nanoindentation and molecular dynamics simulations the benefits of incoherent twin boundaries (ITBs) to both (1) strenghtening and (2) work hardening. ITBs are strong barriers to dislocations and lead to significant work hardening, where ITBs migrate from dislocation interactions, allowing for further accommodation of plasticity at high stresses