Resources Contact Us Home
Method of an ultra-short femtosecond pulse and KW class high average-power laser for preventing cold-worked stress corrosion cracking in iron steels and alloyed steels including stainless stee

Image Number 4 for United States Patent #7651576.

The method of preventing cold-worked stress corrosion cracking in the iron steels and alloyed steels including stainless steels comprises removing a residual tensile stressed layer, optionally generating residual compression, through the impact of irradiation with the ultra-short femtosecond pulse and kW class high average-power laser, and removing a hardened surface layer extremely susceptible to stress corrosion cracking, whereby this susceptible hardened surface layer with many concentrated dislocation defects and the likes is removed without generating or introducing any of such hardened layer in the process of its removal. The method is free from the risk of damaging other equipment by peening with steel balls or other shaped shots, is almost unlimited in actual environment, effectiveness, work, place and other conditions for application, is inexpensive, and functions continuously for a much longer period than an ordinary nuclear reactor's service lifetimes.

  Recently Added Patents
Storage system, control method therefor, and program
Communication apparatus and communication system
Electric separator, method for the production and use thereof
Silicas and alkali metal salt compositions, detergents formed from such compositions and method of forming such compositions and detergents
Charged particle beam apparatus
Electrophotographic photoreceptor and image forming apparatus including the same
Virtual physician acute myocardial infarction detection system and method
  Randomly Featured Patents
Method and apparatus for ultrasonic cross-sectional inspection
Formation of a fabric seam by ultrasonic gap welding of a flat woven fabric
Reactor cavity seal joint
Pivoted lifting device
Staging of tidal power reserves to deliver constant electrical generation
Method of controlling a servomotor
Process for detecting a ground fault in an electric power transmission line
Sulfo-pendent aryletherketone copolymers film containing NLO chromophore
Systems and methods for dual-carrier modulation encoding and decoding
System and method for producing copper powder by electrowinning using the ferrous/ferric anode reaction