Selection of locating feature point in X-ray detection images for laser weldments with complex structure was discussed, mathematic models of defects depth and deviation were established, and spatial distribution feature of defects in precision weldments was determined.

The detection methods of laser weldments with complex structure were discussed,and the detection scheme of its inner defects was demonstrated in this paper.

Porosity prevention of 1420 Al-Li alloy for laser welding;

State-of-arts of visual sensing technology to monitor laser welding process;

Study on the twin-focus technique in laser welding;

The mechanical properties,microstructure and micro-hardness of laser welded joint were researched.

During the laser welding stainless steel 304 with deep penetration,it reasearches the relationship between laser tchnique and seam shape based on the method of secondary general rotary regression design.

This paper introduces the current status and several important points of the development activities at the Vehicle Structure Technology Division,RTRI,such as evaluation of strength of laser weld in car body structure,double action rubber draft gear with damping devices,researches on the suppression of flexural vibration of car body,studies to suppress vertical vibration o.

Microstructure and properties of joints of wrought magnesium alloy AM60 plates welded by laser beam welding;

Process instability in laser beam welding of 5083 aluminium alloy for shipbuilding;

Study on the weldability of the quenched and tempered 30CrMnSiA with laser beam welding;

In this paper, pulse YAG laser welding of stainless steel string with weak - magnetism, constant -elasticity (φ= 0.

Dynamic process and spectral distribution of vapor/plasmas during YAG laser welding of 5A90 Al-Li alloy were obtained by high-speed camera and spectra measure system.