Effect of laser surface melting in tensile properties of type 304L stainless steel

Journal Article · Wed Jul 15 04:00:00 EDT 1992 · Scripta Metallurgica et Materialia; (United States)

DOI:https://doi.org/10.1016/0956-716X(92)90111-Q· OSTI ID:7081713

Akgun, O V; Inal, O T ^[1]; Lovato, M L; Jervist, T R ^[2]

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1. New Mexico Inst. of Mining and Technology, Materials and Metallurgical Engineering Dept., Socorro, NM (US)
2. Los Alamos National Lab., Los Alamos, NM (US)

In previous study the authors showed laser surface melting (LSM) to increase yield strength of 304 austenitic stainless steels. A consistent increase approximately 10% was also observed in the hardness of the melted layer compared to that of the substrate. Austentic stainless steels do not transform to martensite during laser processing. The microstructure is observed to contain only austenite and some retained {delta}-ferrite due to rapid cooling. Therefore, the hardness increase observed was interpreted to be due to microstructural modifications, namely in the formation of austenite {delta}-ferrite duplex structure as well as a refinement in the subgrain structure. The alloy used in this study, type 304L, is a lower carbon modification of type 304 for welding applications. Lower carbon content minimizes carbide precipitation in the heat affected zone of welds. In an annealed condition type 304L has lower mechanical properties than type 304. This paper reports on this present study which was undertaken to verify if a material that possesses an initially high yield strength, type 304L, would exhibit a similar increase in its yield strength and the magnitude of this enhancement at different test temperatures (22, 100, 200 and 300{degrees}C).

• OSTI ID: 7081713
• Journal Information: Scripta Metallurgica et Materialia; (United States), Journal Name: Scripta Metallurgica et Materialia; (United States) Vol. 27:2; ISSN SCRME
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103 -- Metals & Alloys-- Mechanical Properties
360106* -- Metals & Alloys-- Radiation Effects
ALLOYS
AUSTENITIC STEELS
CHROMIUM ALLOYS
CHROMIUM-NICKEL STEELS
CORROSION RESISTANT ALLOYS
CRYSTAL STRUCTURE
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
HEATING
HIGH ALLOY STEELS
IRON ALLOYS
IRON BASE ALLOYS
LASER-RADIATION HEATING
LOW CA
MATERIALS
MECHANICAL PROPERTIES
MELTING
MICROSTRUCTURE
MODIFICATIONS
NICKEL ALLOYS
PHASE TRANSFORMATIONS
PLASMA HEATING
STAINLESS STEEL-304L
STAINLESS STEELS
STEEL-CR19NI10-L
STEELS
TEMPERATURE RANGE
TEMPERATURE RANGE 0273-0400 K
TEMPERATURE RANGE 0400-1000 K
TENSILE PROPERTIES
YIELD STRENGTH