Engineering Commons^™

Effect Of Hydrogen On The Nucleation And Motion Of Dislocations, Mohammad Zamanzade, Jorge Velayarce, Christian Motz, Oscar Torrents Abad, Afrooz Barnoush

Nanomechanical Testing in Materials Research and Development V

Conventional mechanical tests are costly, time consuming, and due to their large scale, not very successful in obtaining mechanistic information. In contrast, the local method like nanoindentation, compression or bending test of micro pillars have comprehensive ranges of possibilities to achieve an essential understanding about the influence of substitutional atoms and/or interstitial atoms (e.g., hydrogen and nitrogen) on the mechanical properties like Young´s modulus, Gibbs free energy for homogeneous dislocation nucleation, dislocation line energy and also friction stress. These methods allow us to measure the mechanical behavior in simulated environments and atmospheres close to the routine industrial applications.

Nanoindentation was …

Influence Of Temperature On The Deformation Behavior Of Single-And Bi-Crystal Microbending Beams, Jorge Velayarce, Mohammad Zamanzade, Oscar Torrents, Christian Motz

Nanomechanical Testing in Materials Research and Development V

The mechanical behavior of micron-scale structures varies drastically from their macro-scale counterparts. This phenomenon is known as size effect and has been extensively investigated for several decades. The understanding of the influence of temperature on the mechanical properties of components of electronic devices with micron or even sub-micrometer dimensions is essential for a reliable design. Hence micro-compression and micro-tension experiments on pure single-crystalline and polycrystalline face-centered cubic (fcc) metals have been carried out at different temperatures. However, in real microstructures complex stress and strain gradients arise from incompatibilities in elastic and plastic deformation, which are not addressed in tension or …