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
Methods to prepare silicon-containing films
Detecting patterns of events in information systems
Computing infrastructure
Silicon on insulator (SOI) wafer and process for producing same
Middle in-situ doped SiGe junctions for PMOS devices on 28 nm low power/high performance technologies using a silicon oxide encapsulation, early halo and extension implantations
Vehicle exterior
Method for preparation of ruthenium-indenylidene carbene catalysts
  Randomly Featured Patents
Method of treating a gas stream
Conference calls via an intelligent call waiting interface
Method and combination electronic communication and medical diagnostic apparatus for detecting/monitoring neuropathy
Belt buckle for holding a can of smokeless tobacco
Electrotherapeutic apparatus
Waterproof apparatus for terminal connecting portion of sheathed wire
Method and apparatus for converting a programmable logic device designed into a selectable target gate array design
Ultrasonic transducer with low cavitation
Progressive safety gear
Control apparatus for two-speed, single phase compressor