Research Progress and Development Trend of Hydrogen Embrittlement Resistance Technology of Laser Manufacturing
Hydrogen is characterized by its low density and small volume,which allows it to readily permeate metal surfaces and infiltrate the atomic lattice.Hydrogen atoms that accumulate at material defects can recombine into hydrogen molecules,and the aggregation of these molecules can generate substantial hydrogen pressure,leading to the formation of hydrogen induced cracks.This phenomenon is known as hydrogen embrittlement.Hydrogen embrittlement hinders the widespread application of various metal materials in hydrogen energy storage and transportation,posing a threat to the safety of components in service.Overcoming hydrogen embrittlement is one of the significant challenges in the field of materials engineering.Laser manufacturing technology has shown certain application potential in the field of hydrogen embrittlement resistance.This paper reviews various laser manufacturing techniques such as laser peening,laser surface hardening,laser cladding,laser surface melting,selective laser melting,laser welding,and laser surface annealing in the context of hydrogen embrittlement resistance.It focuses on analyzing how these techniques affect the microstructure and mechanical properties of materials in a hydrogen rich environment,discusses the challenges and technical bottlenecks encountered in the application process,and proposes the development trends of laser manufacturing technology in enhancing the hydrogen embrittlement resistance of metal materials.
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