Click Here to Download: https://ouo.io/mGqin7 Probing Crystal Plasticity at the Nanoscales Synchrotron X-ray Microdiffraction By: Arief Suriadi Budiman Publisher: Springer Print ISBN: 9789812873347, 9812873341 eText ISBN: 9789812873354, 981287335X Copyright year: 2015 Format: EPUB Available from $ 69.99 USD SKU 9789812873354 This Brief highlights the search for strain gradients and geometrically necessary dislocations as a possible source of strength for two cases of deformation of materials at small scales: nanoindented single crystal copper and uniaxially compressed single crystal submicron gold pillars. When crystalline materials are mechanically deformed in small volumes, higher stresses are needed for plastic flow. This has been called the Smaller is Stronger phenomenon and has been widely observed. studies suggest that plasticity in one case is indeed controlled by the GNDs (strain gradient hardening), whereas in the other, plasticity is not controlled by strain gradients or sub-structure hardening, but rather by dislocation source starvation, wherein smaller volumes are stronger because fewer sources of dislocations are available (dislocation starvation hardening).
