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Краткое описание
Factors affecting the impact toughness of ultra low carbon steel weld metal
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Автор
Gwin, Mary Elizabeth.
Название
Factors affecting the impact toughness of ultra low carbon steel weld metal
Издательство
Monterey, California: Naval Postgraduate School;Springfield, Va.: Available from National Technical Information Service
Описание
Thesis advisor(s): A.G. Fox
"September 1996."
Thesis (M.S. in Mechanical Engineering) Naval Postgraduate School, September 1996
Includes bibliographical references
The fundamental factors affecting the impact toughness of four gas metal arc welds (GMAW) made on HSLA-100 base plate using a newly developed steel weld wire were studied. The weld metal analysis included chemistry, mechanical testing (hardness, CVN/FATT), as well as optical, scanning and transmission electron microscopy. Studies of inclusion composition using energy dispersive x-ray (EDX), and electron energy loss spectroscopy (EELS) in the transmission electron microscope were also performed. It was found that increasing oxygen content of the weld metal (due to increased oxygen in the shielding gas) led to increased non-metallic inclusion size and volume fraction; which in turn, led to both decreasing strength and toughness. The strength was lowered because increasing oxygen in the shielding gas led to increased 'consumption' of strengthening alloys such as carbon, manganese and silicon. The toughness was compromised by the increasing size and number of oxide inclusions as these provide sites for void formation and subsequent fracture
Mode of access: World Wide Web
System requirements: Adobe Acrobat Reader
US Navy (USN) author
dk/dk cc:9996 01/14/97
Subjects:
Язык
английский
Дата публикации
сентябрь 1996
publication_date QS:P577,+1996-09-00T00:00:00Z/10
Текущее местонахождение
IA Collections: navalpostgraduateschoollibrary; fedlink; americana
FEDLINK - United States Federal Collection factorsaffecting00gwin (User talk:Fæ/IA books#Fork8) (batch 1993-2020 #16069)
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Краткое название
Factors affecting the impact toughness of ultra low carbon steel weld metal