|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||In Operando Nano- and Micro-mechanical Characterization of Materials with Special Emphasis on In Situ Techniques
||Oxygen Induced Softening of Deep-submicron Cu Nanopillars
||Zhangjie Wang, Penghan Lu, Degang Xie, Zhiwei Shan
|On-Site Speaker (Planned)
Using quantitative mechanical testing in an environmental transmission electron microscope, we have investigated the effect of O2 on the mechanical behavior of <100>-orientated Cu nanopillars with diameters ranging from 60 nm to 350 nm. Compared to that in vacuum, there is a critical sample size below which the strength of the Cu nanopillars exposed to 1 Pa O2 dropped significantly. In addition, we observed an interesting process about metastable deformation twinning which shows twins nucleate first and disappear later in the programmed loading stage. The underlying physical mechanism of the observed phenomena will be discussed in this talk. Our findings are expected to shed insights on evaluating the mechanical performance of small volume metals in ambient environments.
||Planned: A print-only volume