High-energy density beam processes for welding, including laser beam welding and
electron beam welding, are essential processes in many industries and provide unique …

Thick-section steel is widely used in large structural applications, taking advantage of its
characteristics, including high strength, good toughness, and low cost. Ultra-high-power …

Laser powder bed fusion (LPBF) additive manufacturing (AM) is developing with the goal of
fabricating parts with high performance and high efficiency. Laser power is the key factor to …

Spatters are frequently occurred defects in laser welding, which affect the weld aesthetics,
deteriorate the mechanical performances and even lead to the weld joint rejection for …

As a combination of the annular laser beam and gaussian laser beam, adjustable ring mode
(ARM) laser is a promising technology for stabilizing laser-based welding process. Process …

Beam oscillation in the laser welding process has demonstrated numerous advantages in
suppressing spatters, eliminating pores, and reducing gap sensitivity, particularly for joining …

The quantum defect (QD) is an important issue that demands prompt attention in high-power
fiber lasers. A large QD may aggravate the thermal load in the laser, which would impact the …

The high absorption confined-doped ytterbium fiber with 40/250 μm core/inner-cladding
diameter is proposed and fabricated, where the relative doping ratio of 0.75 is selected …

Acicular ferrite (AF) is the most important microstructural constituent to achieve high
toughness at low temperatures in weld metal of steels. This is due to the relatively small …

The currently available high-power laser presents significant opportunities for welding of
thick section components in single-pass. However, weld defects frequently occur and depth …