Submicron defects in rapidly solidified Type 304 stainless steel powders containing noble gases

Journal Article · Sun May 01 04:00:00 EDT 1988 · Scr. Metall.; (United States)

DOI:https://doi.org/10.1016/S0036-9748(88)80184-4· OSTI ID:6628811

Bae, J C; Kelly, T F; Flinn, J E; Wright, R N

The purpose of this work is to examine the defect microstructure of 304 SS powders processed by different atomization methods. The powders examined were processed by centrifugal atomization (CA) and vacuum gas atomization (VGA). In the CA process the molten droplets exiting from the spinning cup were convectively cooled with flowing helium. The VGA process involves pressurizing and mechanical mixing of the melt with argon. The entrapped argon in the melt, as well as the carrier argon associated with the melt stream, produces the molten droplets. Optical microscopy was performed on screened particle sizes to resolve the morphological features such as porosity and solidification microstructure.

• Research Organization: Dept. of Metallurgical and Mineral Engineering, Univ. of Wisconsin-Madison, Madison, WI (US)
• OSTI ID: 6628811
• Journal Information: Scr. Metall.; (United States), Journal Name: Scr. Metall.; (United States) Vol. 22:5; ISSN SCRMB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101 -- Metals & Alloys-- Preparation & Fabrication
360102* -- Metals & Alloys-- Structure & Phase Studies
ALLOYS
ARGON
ATOMIZATION
AUSTENITIC STEELS
CENTRIFUGATION
CHROMIUM ALLOYS
CHROMIUM-NICKEL STEELS
CORROSION RESISTANT ALLOYS
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DISSOLVED GASES
ELEMENTS
EXPERIMENT PLANNING
FLUIDS
GAS SATURATION
GASES
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
HELIUM
HIGH ALLOY STEELS
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS
METALLURGY
MICROSCOPY
MIXING
MORPHOLOGY
NICKEL ALLOYS
NONMETALS
OPTICAL MICROSCOPY
PHASE TRANSFORMATIONS
PLANNING
POROSITY
POWDER METALLURGY
POWDERS
PRESSURIZING
RARE GASES
SATURATION
SEPARATION PROCESSES
SOLIDIFICATION
SOLUTES
STAINLESS STEEL-304
STAINLESS STEELS
STEEL-CR19NI10
STEELS