Publications de Zhongwen Yao | EPFL Graph Search

ForMAX - a beamline for multiscale and multimodal structural characterization of hierarchical materials

Marianne Liebi, Yiming Li, Yi Zhang, Vitor Silva, Zhongwen Yao

The ForMAX beamline at the MAX IV Laboratory provides multiscale and multimodal structural characterization of hierarchical materials in the nanometre to millimetre range by combining small- and wide-angle X-ray scattering with full-field microtomography. ...

Int Union Crystallography2024

Study of cascades damage in Ni by MD with different interatomic potentials

Robin Schäublin, Zhongwen Yao

Molecular dynamics (MD) simulations, performed with embedded atom potentials, are used to understand the formation of defects following displacement cascades in Ni. Different empirical potentials, presenting large differences in stacking fault energy (SFE) ...

2007

Synergistic effects of PKA and helium on primary damage formation in Fe-0.1%He

Robin Schäublin, Zhongwen Yao, Gang Yu

Molecular dynamics (MD) simulation of displacement cascades in Fe-0.1%He are used to investigate the synergistic effects of primary knock-on atoms (PKA) and He on the irradiation damage production at temperatures between 10 K and 523 K. The results indicat ...

2007

Irradiation-induced stacking fault tetrahedra in fcc metals

Nadine Baluc, Robin Schäublin, Zhongwen Yao

Irradiation induces the formation of stacking fault tetrahedra (SFTs) in a number of fcc metals, such as stainless steel and pure copper. In order to understand the role of the material's parameters on this formation, pure Cu, Ni, Pd and Al, having a respe ...

2005

The tensile properties of irradiated Ni single crystals and their temperature dependence

Philippe Spätig, Robin Schäublin, Zhongwen Yao

Single-crystal nickel was irradiated with 590 MeV protons to 10(-1) dpa at room temperature. Irradiated and unirradiated tensile samples were deformed and relaxation tests were performed at temperatures between 77 and 423 K. The tests show a strong tempera ...

2005

Dislocation defect interaction in irradiated Cu

Philippe Spätig, Robin Schäublin, Zhongwen Yao

Pure Cu single crystals irradiated at room temperature to low doses with 590MeV protons have been deformed in situ in a transmission electron microscope in order to identify the basic mechanisms at the origin of hardening. Cu irradiated to 10(-4) dpa shows ...

2005

The relationship between the irradiation induced damage and the mechanical properties of single crystal Ni

Zhongwen Yao

Irradiation is known to lead to a degradation of the mechanical properties of materials. This is particularly crucial in the case of materials that will be used in the future thermonuclear fusion reactor, where extremely high irradiation doses are expected ...

EPFL2005