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(1) Size dependent strengthening in high strength Al/Ti multilayers
(1) Size dependent strengthening in high strength Al/Ti multilayers
Y.F. Zhang, S. Xue, Q. Li, Jin Li, Jie Ding, T. J. Niu, R. Su, H. Wang, and X. Zhang. "Size dependent strengthening in high strength nanotwinned Al/Ti multilayers." Acta Materialia 175 (2019): 466-476.
Y.F. Zhang, S. Xue, Q. Li, Jin Li, Jie Ding, T. J. Niu, R. Su, H. Wang, and X. Zhang. "Size dependent strengthening in high strength nanotwinned Al/Ti multilayers." Acta Materialia 175 (2019): 466-476.
Highlight: This study explores the size dependent strenghtening of Al/Ti multilayers, and shows increasing hardness with decreasing layer thickness (h) and no softening. When h > 4.5 nm, TEM analyses show the highly textured {0002} HCP Ti and {111} Al containing high-density ITBs and 9R phase. Ti experiences partial HCP-to-FCC phase transformation when h < 4.5 nm, while FCC Ti with CTBs and SFs dominate when h ≤ 2 nm. Chemical stress, high-density growth twins and stacking faults contribute to the high strength of nanotwinned Al/Ti multilayers.
(2) Partial dislocations and defect network mediated plasticity in Cu/Co multilayers
(2) Partial dislocations and defect network mediated plasticity in Cu/Co multilayers
Ruizhe Su, Dajla Neffati, Qiang Li, Sichuang Xue, Jaehun Cho, Jin Li, Jie Ding et al. "Ultra-high strength and plasticity mediated by partial dislocations and defect networks: Part I: Texture effect." Acta Materialia 185 (2020): 181-192.
Ruizhe Su, Dajla Neffati, Qiang Li, Sichuang Xue, Jaehun Cho, Jin Li, Jie Ding et al. "Ultra-high strength and plasticity mediated by partial dislocations and defect networks: Part I: Texture effect." Acta Materialia 185 (2020): 181-192.
Highlight: In this study, different Si substrates are used to tailor the texture of Cu/Co multilayers, and as a result alter the defect networks present. This leads to drastically different mechanical strength and deformability of Cu/Co multilayers with identical individual layer thickness, but having three types of crystallographic orientations and layer interfaces.
(3) Tailoring plasticity of metallic glasses in Cu/CuNb multilayers
(3) Tailoring plasticity of metallic glasses in Cu/CuNb multilayers
Zhe Fan, Qiang Li, Jin Li, Sichuang Xue, Haiyan Wang, and Xinghang Zhang. "Tailoring plasticity of metallic glasses via interfaces in Cu/amorphous CuNb laminates." Journal of Materials Research 32, no. 14 (2017): 2680-2689.
Zhe Fan, Qiang Li, Jin Li, Sichuang Xue, Haiyan Wang, and Xinghang Zhang. "Tailoring plasticity of metallic glasses via interfaces in Cu/amorphous CuNb laminates." Journal of Materials Research 32, no. 14 (2017): 2680-2689.
Highlight: In this study, the fracture and plasticity of Cu/a-CuNb laminates were explored under both tension and compression. The incorporation of Cu can prominently promote shear delocalization in a-CuNb, which would normally have featureless brittle fracture surface
(4) High strength Mg/Nb nanolayer composites
(4) High strength Mg/Nb nanolayer composites
B. Ham., and X. Zhang. "High strength Mg/Nb nanolayer composites." Materials Science and Engineering: A 528, no. 4-5 (2011): 2028-2033.
B. Ham., and X. Zhang. "High strength Mg/Nb nanolayer composites." Materials Science and Engineering: A 528, no. 4-5 (2011): 2028-2033.
Highlight: This study explored the structural evolution and mechanical properties of Mg/Nb multilayer composites. It was shown that below 5nm layer thickness, metastable BCC Mg is present and these composites demonstrate greater strength than most Mg alloys
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