scholarly journals Crystallographic Evaluation of Susceptibility to Intergranular Corrosion in Austenitic Stainless Steel with Various Degrees of Sensitization

Materials ◽  
2020 ◽  
Vol 13 (3) ◽  
pp. 613 ◽  
Author(s):  
Tomoyuki Fujii ◽  
Takaya Furumoto ◽  
Keiichiro Tohgo ◽  
Yoshinobu Shimamura
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Intergranular Corrosion ◽  
Coincidence Site Lattice ◽  
Unit Cell ◽  
304 Stainless Steel ◽  
Cell Area ◽  
Sigmoid Curve ◽  
The Stability ◽  
The Relationship

This study investigated the susceptibility to intergranular corrosion (IGC) in austenitic stainless steel with various degrees of sensitization (DOSs) from a microstructural viewpoint based on the coincidence site lattice (CSL) model. IGC testing was conducted using oxalic acid and type 304 stainless steel specimens with electrochemical potentiokinetic reactivation (EPR) ratios that varied from 3 to 30%. As a measure of IGC susceptibility, the width of the corroded groove was used. The relationship between IGC susceptibility, grain boundaries (GB) structure, and EPR ratio of the specimens was evaluated. As a result, the IGC susceptibility cannot be characterized using the Σ value, irrespective of the DOS of the specimen. The IGC susceptibility increases with increasing unit cell area of CSL boundaries, which is a measure of the stability of the CSL boundaries, and then levels off. The relationship between the IGC susceptibility and unit cell area is sigmoidal, irrespective of the DOS of the specimen. The sigmoid curve shifts rightward and the upper bound of IGC susceptibility decreases with decreasing DOS of the specimen.

Effect of Austenizing and Tempering Time on Corrosion Rate of Austenitic Stainless Steel in Oxalic Acid

2014 ◽  
Vol 980 ◽  
pp. 46-51
Author(s):  
Mohamed A. Gebril ◽  
M.S. Aldlemey ◽  
Farag I. Haider ◽  
Naji Ali
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Corrosion Rate ◽  
Oxalic Acid ◽  
Intergranular Corrosion ◽  
Room Temperature ◽  
304 Stainless Steel ◽  
Tempering Temperature ◽  
Weight Losses ◽  
Tempering Time

The aim of this work is to study the effect of austenizing time, tempering process and tempering time on corrosion rate of austenitic stainless steel in oxalic acid. The samples of typical 304 stainless steel were heated to 1050°C for 10, 20 and 30 minutes and quenched to room temperature in water, then tempered at 250°C, 400°C and 600°C for 30, 60 minutes for each tempering time. These samples were then immersed in 0.1M of oxalic acid and then their weight losses were measured after 30 days. The result obtained show that corrosion rate of all austenitic stainless steel samples decreased with an increase austenizing time, this behaviour is due to more homogenously of austenite, and the corrosion rate will be increased with increase the tempering temperature and tempering time, this behaviour is due different phases at microstructure below 400°C, and above of 400 to 600°C the corrosion rate will be increased due to formation of carbides which are non-uniform distributed at the grain boundaries and causes intergranular corrosion.

SANDVIK 5R75

Alloy Digest ◽  
2000 ◽  
Vol 49 (11) ◽  
Keyword(s):  
Fracture Toughness ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Austenitic Stainless Steel ◽  
Physical Properties ◽  
Intergranular Corrosion ◽  
Heat Treating ◽  
Steel Company ◽  
Temperature Performance

Abstract Sandvik 5R75 is a molybdenum-containing austenitic stainless steel with titanium added to prevent intergranular corrosion by tying up the carbon. This datasheet provides information on composition, physical properties, hardness, and tensile properties as well as fracture toughness. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-777. Producer or source: Sandvik Steel Company. Originally published March 2000, corrected November 2000.

ALZ 321

Alloy Digest ◽  
2001 ◽  
Vol 50 (4) ◽  
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
Austenitic Stainless Steel ◽  
Physical Properties ◽  
Tensile Properties ◽  
Intergranular Corrosion ◽  
Heat Treating

Abstract ALZ 321 is an austenitic stainless steel with good cold formability, corrosion resistance, toughness, and mechanical properties. The addition of titanium improves the resistance to intergranular corrosion in welds and slower cooling sections. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on forming, heat treating, and machining. Filing Code: SS-821. Producer or source: ALZ nv.

Effect of Milling Parameters on the Stability of the Passive Film of AISI 304 Stainless Steel

2021 ◽  
Author(s):  
Rafael dos Santos Pereira ◽  
Roosevelt Droppa ◽  
Mara Cristina Lopes de Oliveira ◽  
Renato Altobelli Antunes
Keyword(s):  
Stainless Steel ◽  
Passive Film ◽  
304 Stainless Steel ◽  
Aisi 304 Stainless Steel ◽  
Aisi 304 ◽  
Milling Parameters ◽  
The Stability

CARTECH 321

Alloy Digest ◽  
2021 ◽  
Vol 70 (8) ◽  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Austenitic Stainless Steel ◽  
Titanium Carbide ◽  
Physical Properties ◽  
Tensile Properties ◽  
Intergranular Corrosion ◽  
Heat Treating ◽  
Technology Corporation ◽  
Carpenter Technology Corporation

Abstract CarTech 321 is a titanium-stabilized chromium-nickel austenitic stainless steel that was developed to provide the performance of an 18-8 austenitic stainless steel with improved intergranular corrosion resistance. Since titanium has a stronger affinity for carbon than chromium, titanium carbide tends to precipitate randomly within the grains instead of forming continuous patterns at the grain boundaries. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-1338. Producer or source: Carpenter Technology Corporation.

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