scholarly journals The influence of high-temperature oxidation on the phase distribution of metal substrate in duplex stainless steel

2021 ◽  
Author(s):  
Minami Matsumoto ◽  
Ken Kimura ◽  
Natsuko Sugiura
Keyword(s):  
Stainless Steels ◽  
Room Temperature ◽  
Phase Distribution ◽  
High Strength ◽  
Metal Substrate ◽  
Temperature Oxidation ◽  
Good Corrosion Resistance ◽  
Mn Oxide ◽  
Typical Type ◽  
Compositional Changes

AbstractDuplex stainless steels (DSSs), which consist of ferrite and austenite phases, are widely used owing to their high strength and good corrosion resistance. However, the oxidation behavior of DSSs is extremely complicated because they have dual phases. In this study, changes in the scale and the metal substrate during oxidation were investigated. UNS S32101 (Fe-21.5%Cr–5%Mn–1.5%Ni–0.3%Mo–0.22%N), which is a typical type of DSS, was annealed at 1473 K for up to 36 ks in air. The microstructure of UNS S32101 consisted of austenite/ferrite phases, the ratio of which was 50:50 at room temperature. After oxidation, Cr, Mn-oxide formed predominantly. The metal substrate beneath the scale changed mostly to ferrite. In the same region, depletion of Mn and N concentrations resulted. The decrease in Mn was due to the formation of Cr, Mn-oxide. In addition, it was revealed that N content of the metal substrate decreased due to the formation of N2 gas along with the depletion of Mn. It was assumed that the decrease in Mn and N, which are austenite-stabilized elements, led to an increase in ferrite in the depletion area of Mn and N. From this result, it was expected that the compositional changes in the Mn/N depletion area were caused by the oxidation of steel.

LANGALLOY 400

Alloy Digest ◽  
2007 ◽  
Vol 56 (6) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Curie Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
Copper Alloy ◽  
Room Temperature ◽  
High Strength ◽  
Nickel Copper ◽  
Long Time ◽  
Compositional Changes

Abstract Langalloy 400 is a nickel-copper alloy for general use. It has an excellent combination of high strength, ductility, and corrosion resistance. The Curie temperature of the alloy is close to room temperature and varies with slight compositional changes. Langalloy 400 has been used as marine fasteners for a long time. This datasheet provides information on physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming and machining. Filing Code: Ni-651. Producer or source: Langley Alloys.

CRUCIBLE XM 19 STAINLESS

Alloy Digest ◽  
1982 ◽  
Vol 31 (9) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Stainless Steels ◽  
Cold Work ◽  
High Strength ◽  
Heat Treating ◽  
Low Carbon ◽  
Good Corrosion Resistance ◽  
Temperature Performance ◽  
Aisi Type ◽  
Cold Worked

Abstract CRUCIBLE XM 19 Stainless is a nitrogen-strengthened, low-carbon austenitic stainless steel that provides good corrosion resistance in combination with high strength. The alloy has better corrosion resistance than AISI Type 316 with approximately twice the yield strength. It can be welded, machined and cold worked using the same equipment and methods used for the conventional AISI 300 series stainless steels. It is nonmagnetic as annealed and after severe cold work. Its many uses include cables, fasteners, pumps, valves, marine hardware and springs. This datasheet provides information on composition, physical properties, hardness, and tensile properties as well as fracture toughness. It also includes information on low temperature performance and corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: SS-414. Producer or source: Crucible Specialty Metals Division, Colt Industries.

scholarly journals Multiscale Characterization of An Oxide Scale Formed on the Creep-Resistant ATI 718Plus Superalloy during High-Temperature Oxidation

Materials ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 6327
Author(s):  
Adam Kruk ◽  
Aleksander Gil ◽  
Sebastian Lech ◽  
Grzegorz Cempura ◽  
Alina Agüero ◽  
...  
Keyword(s):  
Phase Distribution ◽  
3D Visualization ◽  
Three Dimensional ◽  
High Strength ◽  
Temperature Oxidation ◽  
Near Surface ◽  
Cr2o3 Scale ◽  
Surface Areas ◽  
The Difference ◽  
Original Insight

The ATI 718Plus® is a creep-resistant nickel-based superalloy exhibiting high strength and excellent oxidation resistance in high temperatures. The present study is focused on multiscale 2D and 3D characterization (morphological and chemical) of the scale and the layer beneath formed on the ATI 718Plus superalloy during oxidation at 850 °C up to 4000 h in dry and wet air. The oxidized samples were characterized using various microscopic methods (SEM, TEM and STEM), energy-dispersive X-ray spectroscopy and electron diffraction. The 3D visualization of the microstructural features was achieved by means of FIB-SEM tomography. When oxidized in dry air, the ATI 718Plus develops a protective, dense Cr2O3 scale with a dual-layered structure. The outer Cr2O3 layer is composed of coarser grains with a columnar shape, while the inner one features fine, equiaxed grains. The Cr2O3 scale formed in wet air is single-layered and features very fine grains. The article discusses the difference between the structure, chemistry and three-dimensional phase distribution of the oxide scales and near-surface areas developed in the two environments. Electron microscopy/spectroscopy findings combined with the three-dimensional reconstruction of the microstructure provide original insight into the role of the oxidation environment on the structure of the ATI 718Plus at the nanoscale.

CARPENTER STAINLESS 22Cr-13Ni-5Mn

Alloy Digest ◽  
1978 ◽  
Vol 27 (7) ◽  
Keyword(s):  
Fracture Toughness ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
Stainless Steels ◽  
Cold Work ◽  
High Strength ◽  
Heat Treating ◽  
Good Corrosion Resistance ◽  
Aisi Type ◽  
Cold Worked

Abstract CARPENTER STAINLESS 22Cr-13Ni-5Mn has very good corrosion resistance in combination with high strength. It has better corrosion resistance than AISI Type 316 stainless steel and approximately twice the yield strength. Carpenter 22Cr-13Ni-5Mn can be machined, cold worked and welded using the same equipment and methods used for the conventional AISI 300 series of stainless steels. It is nonmagnetic as annealed and after severe cold work. This datasheet provides information on composition, physical properties, hardness, and tensile properties as well as fracture toughness. It also includes information on corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: SS-353. Producer or source: Carpenter.

ALCHEMI of B2-Ordered Fe50Al45Me5 alloys

1996 ◽  
Vol 54 ◽  
pp. 548-549
Author(s):  
Ian M. Anderson
Keyword(s):  
Room Temperature ◽  
Iron Aluminide ◽  
Low Density ◽  
Intermetallic Alloys ◽  
Practical Applications ◽  
Alloying Additions ◽  
Site Distribution ◽  
Good Corrosion Resistance ◽  
Room Temperature Ductility ◽  
The Matrix

B2-ordered iron aluminide intermetallic alloys exhibit a combination of attractive properties such as low density and good corrosion resistance. However, the practical applications of these alloys are limited by their poor fracture toughness and low room temperature ductility. One current strategy for overcoming these undesirable properties is to attempt to modify the basic chemistry of the materials with alloying additions. These changes in the chemistry of the material cannot be fully understood without a knowledge of the site-distribution of the alloying elements. In this paper, the site-distributions of a series of 3d-transition metal alloying additions in B2-ordered iron aluminides are studied with ALCHEMI.A series of seven alloys of stoichiometry Fe50AL45Me5, with Me = {Ti, V, Cr, Mn, Co, Ni, Cu}, were prepared with identical heating cycles. Microalloying additions of 0.2% B and 0.1% Zr were also incorporated to strengthen the grain boundaries, but these alloying additions have little influence on the matrix chemistry and are incidental to this study.

SILNIC BRONZE

Alloy Digest ◽  
1960 ◽  
Vol 9 (7) ◽  
Keyword(s):  
Corrosion Resistance ◽  
High Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
High Strength ◽  
Heat Treating ◽  
Silicon Alloy ◽  
Good Corrosion Resistance ◽  
Temperature Performance ◽  
Nickel Silicon

Abstract SILNIC BRONZE is a copper-nickel-silicon alloy having high strength, high conductivity and good corrosion resistance. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Cu-90. Producer or source: Chase Brass & Copper Company Inc..

COPPER ALLOY No. 260

Alloy Digest ◽  
1971 ◽  
Vol 20 (9) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Shear Strength ◽  
High Temperature ◽  
Physical Properties ◽  
Copper Alloy ◽  
High Strength ◽  
Heat Treating ◽  
Zinc Alloy ◽  
Good Corrosion Resistance ◽  
Temperature Performance

Abstract COPPER ALLOY No. 260 is a 70% copper-30% zinc alloy having high strength, excellent ductility, and good corrosion resistance. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and shear strength as well as creep and fatigue. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Cu-241. Producer or source: Brass mills.

MONEL ALLOY 502

Alloy Digest ◽  
1970 ◽  
Vol 19 (9) ◽  
Keyword(s):  
Corrosion Resistance ◽  
High Temperature ◽  
Physical Properties ◽  
Surface Treatment ◽  
Tensile Properties ◽  
High Strength ◽  
Heat Treating ◽  
Good Corrosion Resistance ◽  
Temperature Performance

Abstract MONEL alloy 502, a modification of MONEL alloy K-500, provides improved machinability. It maintains high strength up to about 800 F and has good corrosion resistance. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on high temperature performance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: Ni-157. Producer or source: Huntington Alloy Products Division.

BRUSH ALLOY 260-C

Alloy Digest ◽  
1968 ◽  
Vol 17 (9) ◽  
Keyword(s):  
Fracture Toughness ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Physical Properties ◽  
Surface Treatment ◽  
High Strength ◽  
Heat Treating ◽  
Casting Alloy ◽  
Good Corrosion Resistance ◽  
Temperature Performance

Abstract Brush Alloy 260-C is a beryllium nickel casting alloy having high strength, hardness and good corrosion resistance. It is recommended for fuel pump impellers, turbines, non-sparking tools, molds for plastics and glass. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on high temperature performance and corrosion resistance as well as casting, heat treating, machining, joining, and surface treatment. Filing Code: Ni-138. Producer or source: Brush Beryllium Company.

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