Modeling the Multicomponent Columar-to-Equiaxed Transition of Alloy 625

2016 ◽  
pp. 93-100
Author(s):  
Kyle Fezi ◽  
Matthew J. M. Krane
Keyword(s):  
Alloy 625

INCONEL ALLOY 725

Alloy Digest ◽  
1994 ◽  
Vol 43 (1) ◽  
Keyword(s):  
Fracture Toughness ◽  
Corrosion Resistance ◽  
Shear Strength ◽  
Physical Properties ◽  
Tensile Properties ◽  
High Strength ◽  
Heat Treating ◽  
Inconel Alloy ◽  
Alloy 625

Abstract INCONEL ALLOY 725 is an age-hardenable alloy that displays high strength along with excellent ductility and toughness. Its corrosion resistance is comparable to alloy 625. Good flattening properties are exhibited in age-hardened tubing. This datasheet provides information on composition, physical properties, hardness, tensile properties, and shear strength as well as fracture toughness. It also includes information on corrosion resistance as well as heat treating and machining. Filing Code: Ni-445. Producer or source: Inco Alloys International Inc.

INCONEL ALLOY 625 LCF

Alloy Digest ◽  
1992 ◽  
Vol 41 (11) ◽  
Keyword(s):  
Corrosion Resistance ◽  
High Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
Thermal Fatigue ◽  
Inconel Alloy ◽  
Alloy 625 ◽  
Temperature Performance

Abstract INCONEL Alloy 625LCF is a special alloyed, melted, and processed version of INCONEL alloy 625 (Alloy Digest Ni-121, February 1967) to optimize low-cycle and thermal fatigue up to 1200 deg F (650 deg C). This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fatigue. It also includes information on high temperature performance and corrosion resistance as well as forming and joining. Filing Code: Ni-416. Producer or source: Inco Alloys International Inc..

INCOCLAD 625/STEEL

Alloy Digest ◽  
2002 ◽  
Vol 51 (12) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Alloy 625 ◽  
Clad Tube ◽  
Metallurgical Bond

Abstract INCOCLAD625/Steel is a bimetallic clad tube with alloy 625 (UNS N06625) on the outside and with a metallurgical bond holding the alloys together. This datasheet provides information on composition. It also includes information on corrosion resistance as well as forming and joining. Filing Code: Ni-597. Producer or source: Special Metals Corporation.

scholarly journals Characterising hydrogen induced cracking of alloy 625+ using correlative SEM - EDX and NanoSIMS

2020 ◽  
pp. 109228
Author(s):  
Y. Aboura ◽  
D.F. Martelo ◽  
R. Morana ◽  
R. Akid ◽  
K.L. Moore
Keyword(s):  
Alloy 625 ◽  
Hydrogen Induced Cracking

Characterization of Crack Tip Damage Zone Formation on Alloy 625 During Fatigue Crack Growth at 750°C by Transmission EBSD Method

2017 ◽  
Author(s):  
Yuji Ozawa ◽  
Tatsuya Ishikawa ◽  
Yoichi Takeda
Keyword(s):  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Power Plants ◽  
Crack Path ◽  
Damage Zone ◽  
Crack Tip ◽  
Loading Frequency ◽  
Zone Formation ◽  
Alloy 625

In order to clarify the mechanism of fatigue crack growth in alloy 625, which is a candidate material for use in advanced ultra supercritical power plants, the crack tip damage zone formation after a crack growth test conducted in high temperature steam was investigated. It was observed that the oxide thickness at the crack tip tended to increase with decreasing cyclic loading frequency. The crack path was a mix of transgranular and intergranular fractures. According to the grain reference orientation deviation (GROD) maps, it was revealed that the density of geometrically necessary dislocations (GNDs) in the matrix along the crack path and ahead of crack tip increased with an increase in the fatigue crack growth rate (FCGR) due to environmental effects. It was observed that (1) mobile dislocations at the crack surface were blocked due to the thick oxide layer, resulting in an increase in the density of GNDs, and (2) an increase in the density of GNDs might induce stress concentration at the crack tip, deformation twinning, and the acceleration of FCGRs.

scholarly journals Fatigue Variability of Alloy 625 Thin-Tube Brazed Specimens

Metals ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1162
Author(s):  
Seulbi Lee ◽  
Hanjong Kim ◽  
Seonghun Park ◽  
Yoon Suk Choi
Keyword(s):  
Fatigue Life ◽  
Heat Exchanger ◽  
Room Temperature ◽  
Metal Layer ◽  
Outer Diameter ◽  
Multiple Crack ◽  
Joint Failure ◽  
Alloy 625 ◽  
Thin Tube ◽  
Brazed Joint

As an advanced heat exchanger for aero-turbine applications, a tubular-type heat exchanger was developed. To ensure the optimum performance of the heat exchanger, it is necessary to assess the structural integrity of the tubes, considering the assembly processes such as brazing. In this study, fatigue tests at room temperature and 1000 K were performed for 0.135 mm-thick alloy 625 tubes (outer diameter of 1.5 mm), which were brazed to the grip of the fatigue specimen. The variability in fatigue life was investigated by analyzing the locations of the fatigue failure, fracture surfaces, and microstructures of the brazed joint and tube. At room temperature, the specimens failed near the brazed joint for high σmax values, while both brazed joint failure and tube side failure were observed for low σmax values. The largest variability in fatigue life under the same test conditions was found when one specimen failed in the brazed joint, while the other specimen failed in the middle of the tube. The specimen with brazed joint failure showed multiple crack initiations circumferentially near the surface of the filler metal layer and growth of cracks in the tube, resulting in a short fatigue life. At 1000 K, all the specimens exhibited failure in the middle of the tube. In this case, the short-life specimen showed crack initiation and growth along the grains with large through thickness in addition to multiple crack initiations at the carbides inside the tube. The results suggest that the variability in the fatigue life of the alloy 625 thin-tube brazed specimen is affected by the presence of the brazed joint, as well as the spatial distribution of the grain size and carbides.

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