scholarly journals Report on FY 2021 testing in support of integrating Alloy 800H and 2.25Cr-1Mo for EPP analysis

2021 ◽  
Author(s):  
Yanli Wang ◽  
Peijun Hou
Keyword(s):  
Alloy 800H

KUBOTA ALLOY KHR32C

Alloy Digest ◽  
1999 ◽  
Vol 48 (6) ◽  
Keyword(s):  
Physical Properties ◽  
Tensile Properties ◽  
Alloy 800H ◽  
Creep Ductility

Abstract Kubota alloy KHR32C is often regarded as the cast version of Fe-Ni-Cr alloy 800H except it uses niobium as a strengthening agent. The moderately priced alloy has good creep ductility and is available in many cast forms. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as creep. It also includes information on casting. Filing Code: SS-746. Producer or source: Kubota Metal Corporation.

scholarly journals Influence of Post Weld Heat Treatment on the Grain Size, and Mechanical Properties of the Alloy-800H Rotary Friction Weld Joints

Materials ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 4366
Author(s):  
Saqib Anwar ◽  
Ateekh Ur Rehman ◽  
Yusuf Usmani ◽  
Ali M. Al-Samhan
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Grain Size ◽  
Heat Affected Zone ◽  
Tensile Testing ◽  
Weld Zone ◽  
Alloy 800H ◽  
Weld Joints ◽  
Heat Treated ◽  
Friction Weld

This study evaluated the microstructure, grain size, and mechanical properties of the alloy 800H rotary friction welds in as-welded and post-weld heat-treated conditions. The standards for the alloy 800H not only specify the composition and mechanical properties but also the minimum grain sizes. This is because these alloys are mostly used in creep resisting applications. The dynamic recrystallization of the highly strained and plasticized material during friction welding resulted in the fine grain structure (20 ± 2 µm) in the weld zone. However, a small increase in grain size was observed in the heat-affected zone of the weldment with a slight decrease in hardness compared to the base metal. Post-weld solution heat treatment (PWHT) of the friction weld joints increased the grain size (42 ± 4 µm) in the weld zone. Both as-welded and post-weld solution heat-treated friction weld joints failed in the heat-affected zone during the room temperature tensile testing and showed a lower yield strength and ultimate tensile strength than the base metal. A fracture analysis of the failed tensile samples revealed ductile fracture features. However, in high-temperature tensile testing, post-weld solution heat-treated joints exhibited superior elongation and strength compared to the as-welded joints due to the increase in the grain size of the weld metal. It was demonstrated in this study that the minimum grain size requirement of the alloy 800H friction weld joints could be successfully met by PWHT with improved strength and elongation, especially at high temperatures.

The effects of hold time and frequency on crack growth in alloy 800H at 650 °C

1989 ◽  
Vol 20 (9) ◽  
pp. 1727-1734 ◽  
Author(s):  
K. Y. Hour ◽  
J. F. Stubbins
Keyword(s):  
Crack Growth ◽  
Hold Time ◽  
Alloy 800H

A Dislocation Density Based Constitutive Model for Cyclic Deformation

1996 ◽  
Vol 118 (4) ◽  
pp. 441-447 ◽  
Author(s):  
Y. Estrin ◽  
H. Braasch ◽  
Y. Brechet
Keyword(s):  
Cyclic Loading ◽  
Dislocation Density ◽  
Constitutive Model ◽  
Constitutive Equations ◽  
Cyclic Deformation ◽  
Internal Variables ◽  
Density Evolution ◽  
Alloy 800H ◽  
Material Response ◽  
Dislocation Densities

A new constitutive model describing material response to cyclic loading is presented. The model includes dislocation densities as internal variables characterizing the microstructural state of the material. In the formulation of the constitutive equations, the dislocation density evolution resulting from interactions between dislocations in channel-like dislocation patterns is considered. The capabilities of the model are demonstrated for INCONEL 738 LC and Alloy 800H.

A Review of Alloy 800H for Applications in the Gen IV Nuclear Energy Systems

2010 ◽  
Author(s):  
Weiju Ren ◽  
Robert Swindeman
Keyword(s):  
Research And Development ◽  
Environmental Effect ◽  
Nuclear Energy ◽  
Energy Systems ◽  
Extensive Review ◽  
Nuclear System ◽  
Alloy 800H ◽  
Aging Resistance ◽  
Gen Iv ◽  
Data Requirements

Alloy 800H is currently under consideration for applications in the Next Generation Nuclear Plant at operational temperatures above 750°C. To provide supporting information in this paper at the attempt to facilitate the consideration, service requirements of the nuclear system for structural materials is first described; and then an extensive review of Alloy 800H is given on its codification with respect to development and research history, mechanical behavior and design allowables, metallurgical aging resistance, environmental effect considerations, data requirements and availability, weldments, as well as many other aspects relevant to the intended nuclear application; an finally further research and development activities to support the materials qualification are suggested.

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