Abstract: A material composition and a method are provided for improved laser ablation of a surface portion of a part made from the material composition. The material composition includes an additive having known electromagnetic energy absorption characteristics for enhancing energy transfer from a laser beam to the surface portion of the part. The laser beam may have a primary electromagnetic wavelength. The additive may absorb energy at the primary electromagnetic wavelength to enhance energy transfer from the laser beam to the surface portion of the part.

Abstract: A pair of tubes are provided, one of greater diameter than the other so that the tubes can be telescoped together. An annular inward facing projection is formed on the outer tube for contact with the outside surface of the inner tube when the tubes are telescoped together. An annular outer facing projection is formed on the inner tube for contacting with the inside surface of the outer tube when the tubes are telescoped together. An adhesive is placed on one of the tubes for contacting with the other tube when the tubes are telescoped together. After the tubes are telescoped together weld current is conducted through the tubes to weld the annular projections to the respective opposing tube in contact therewith and at least partially cure the adhesive.