The evolution of oxygen-rich nanoparticle and its effect on the mechanical property in selective laser melted 304L stainless steel

A gradient nanostructured layer (GNsL) was generated on the two sides of bulk sample in 304L stainless steel by means of the surface mechanical attrition treatment. The microstructure of the GNsL was characterized via TEM observation. The prominent microstructural features involve the intersection of multi-system twin operation, subdividing the original grains into blocks, a martensite transformation mainly occurring at the interface of the twins as well, and the randomly orientated nanocrystallites at the top of surface. After annealing at 750°C for 10 min, recovery had occurred and the dislocation density was much reduced. The vast majority of the grains at the top surface were in the nanocrystalline/ultrafine range, with some recrystallization regions. The uniaxial tensile tests were performed to obtain the mechanical property of bulk samples with GNsL. The yield strength was about 2 times higher than that of the coarse-grained counterpart, but with a decrease in uniform elongation and elongation to failure as well. The relationship between the microstructure and mechanical property was discussed in detail.

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RELAXATION PEAKS OF COLD WORKED 304L STAINLESS STEEL

Le Journal de Physique Colloques ◽

10.1051/jphyscol:1981530 ◽

1981 ◽

Vol 42 (C5) ◽

pp. C5-193-C5-198 ◽

Cited By ~ 4

Author(s):

N. Igata ◽

H. B. Chen ◽

K. Miyahara ◽

T. Uba

Keyword(s):

Stainless Steel ◽

304L Stainless Steel ◽

Cold Worked

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Effect of milling on the microstructure and mechanical property of austenite stainless steel

Materials Testing ◽

10.3139/120.111603 ◽

2020 ◽

Vol 62 (12) ◽

pp. 1181-1186

Author(s):

Huanchun Wu ◽

Wenxin Ti ◽

Guodong Zhang ◽

Fei Xue ◽

Chengtao Li ◽

...

Keyword(s):

Mechanical Property ◽

Stainless Steel ◽

Austenite Stainless Steel ◽

Microstructure And Mechanical Property

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CARPENTER PROJECT 70+ TYPE 304/304L

Alloy Digest ◽

10.31399/asm.ad.ss0875 ◽

2003 ◽

Vol 52 (2) ◽

Keyword(s):

Stainless Steel ◽

Corrosion Resistance ◽

Physical Properties ◽

Heat Treating ◽

General Purpose ◽

304L Stainless Steel ◽

Type 304 ◽

Complex Parts

Abstract Carpenter Project 70+ Type 304/304L is a modified version of Type 304/304L stainless steel with improved machinability when compared to conventional 304 (Alloy Digest SS-418, revised September 1997) and 304L (Alloy Digest SS-513, revised November 1997). The alloys are nonhardenable austenitic chromium-nickel steels and are good general-purpose materials for simple and complex parts. This datasheet provides information on composition, physical properties, and elasticity. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-875. Producer or source: Carpenter Specialty Alloys.

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SANDVIK 3R12/4L7

Alloy Digest ◽

10.31399/asm.ad.sa0482 ◽

1996 ◽

Vol 45 (7) ◽

Keyword(s):

Stainless Steel ◽

Corrosion Resistance ◽

Carbon Steel ◽

Black Liquor ◽

Heat Treating ◽

304L Stainless Steel ◽

Design Load ◽

Recovery Boilers ◽

Major Application ◽

Outside Diameter

Abstract Sandvik 3R12/4L7 is a composite tube consisting of type 304L stainless steel for corrosion resistance on the outside diameter and having carbon steel (A210 Gr. A1) as the inside component for both water wetted service and the design load. The major application is tubing to handle the corrosive conditions in black liquor recovery boilers. This datasheet provides information on composition, physical properties, microstructure as well as fatigue. It also includes information on forming, heat treating, and joining. Filing Code: SA-482. Producer or source: Sandvik.

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