Abstract Deep-penetration laser beam welding is highly dynamic and affected by many parameters. Several investigations using differently sized spots, spot-in-spot systems, multi-focus optics show that the intensity distribution one of most influential parameters; however, targeted lateral axial design remains a major challenge. Therefore, processing optic has been developed coaxially combines t...

The effect of the volumetric energy density (VED) on keyhole formation, microstructural evolution and associated mechanical properties AlSi10Mg fabricated by selective laser melting (SLM) has been systematically investigated. results indicated that three modes could be distinguished during process, corresponding to different VED ranges, i.e. conduction mode (<50 J mm-3), transitional (~50–65 (>...

The FindEM particle picking program was tested on the publicly available keyhole limpet hemocyanin (KLH) dataset, and the results were submitted for the "bakeoff" contest at the recent particle picking workshop (Zhu et al., 2003b). Two alternative ways of using the program are demonstrated and the results are compared. The first of these approximates exhaustive projection matching with a full s...

We have analyzed a series of mutants derived from a KLH-specific, I-E-restricted T hybridoma (FN1-18) which have lost antigen-reactivity while retaining both T cell receptor idiotypic determinants and the ability to respond to Con A. The variants have not gained any detectable alloreactivity, nor is there an obvious lesion in the mutants' beta chain DNA containing the utilized beta chain genes....

Abstract During metal additive manufacturing, the porosity of as-built part deteriorates mechanical property and even hinders further application manufacturing. Particularly, mechanisms keyhole pores associated with fluctuation are not fully understood. To reveal formation, we adopt a multiphysics thermal-fluid flow model incorporating heat transfer, liquid flow, evaporation, Marangoni effect, ...