Accession Number : ADA115199

Title :   Use of Implant Testing to Evaluate the Susceptibility of HY-130 Steel Weldments to Hydrogen Embrittlement.

Descriptive Note : Master's thesis,

Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s) : Mason,Bradley J

PDF Url : ADA115199

Report Date : Dec 1981

Pagination or Media Count : 108

Abstract : The cracking that may occur near the fusion zone of a steel weldment can often be attributed to the embrittlement of the microstructure by hydrogen induced during the welding process. The modified implant test was used in this case to evaluate the hydrogen-assisted cracking susceptibility of three separate heats of HY-130 steel, which included both cast and wrought plate. Welding was accomplished by the gas metal-arc spray transfer process. Cracking in all plates was observed to initiate and propagate in an area near the weld interface. The exact location of the fractures varied according to the amounts of diffusible hydrogen present and the type of material being tested. The effect of stress intensity together with hydrogen content on the mode of fracture present is also addressed in detail. (Author)

Descriptors :   *Steel, *Weldments, *Hydrogen embrittlement, Implantation, Test methods, Crack propagation, Arc welding, Castings, Wrought metals, Plates, Stress concentration, Resistance, High strength, Microhardness, Chemical composition, Grain structures(Metallurgy), Theses

Subject Categories : Properties of Metals and Alloys

Distribution Statement : APPROVED FOR PUBLIC RELEASE