Anti-twinning in nanoscale tungsten
Jiangwei Wang, Zhi Zeng, Minru Wen, Qiannan Wang, Dengke Chen, Yin Zhang, Peng Wang, Hongtao Wang, Ze Zhang, Scott X. Mao, Ting Zhu
Abstract
by ordinary twinning. This asymmetry in the atomic-scale shear pathway leads to a much higher resistance to anti-twinning than ordinary twinning. However, anti-twinning can become active in nanosized BCC crystals under ultrahigh stresses, due to the limited number of plastic shear carriers in small crystal volumes. Our finding of the anti-twinning phenomenon has implications for harnessing unconventional deformation mechanisms to achieve high mechanical preformation by nanomaterials.
Topics & Concepts
Crystal twinningMaterials scienceNucleationNanoscopic scaleTransmission electron microscopyTungstenNanowireShear (geology)NanomaterialsNanotechnologyComposite materialMetallurgyChemistryMicrostructureOrganic chemistryMicrostructure and mechanical propertiesMetal and Thin Film MechanicsBoron and Carbon Nanomaterials Research