Formation of Serrated Grain Boundaries and Its Effect on Tensile Properties at 950 ℃ in Alloy 617 for Very High Temperature Reactor

2015 ◽  
Vol 53 (1) ◽  
pp. 1-12 ◽  
Author(s):  
Hyun Uk Hong ◽  
June Woo Choi ◽  
Ji Won Lee ◽  
Je Hyun Lee ◽  
Dong Jin Kim
Keyword(s):  
High Temperature ◽  
Grain Boundaries ◽  
Tensile Properties ◽  
Alloy 617 ◽  
Very High Temperature Reactor ◽  
High Temperature Reactor ◽  
Very High

Isochronous Stress-Strain Curves for Alloy 617

2019 ◽  
Author(s):  
M. C. Messner ◽  
T.-L. Sham
Keyword(s):  
High Temperature ◽  
Design Methods ◽  
Austenitic Steels ◽  
High Temperature Deformation ◽  
Temperature Deformation ◽  
Stress Strain ◽  
Alloy 617 ◽  
Very High Temperature Reactor ◽  
High Temperature Reactor ◽  
Very High

Abstract Alloy 617 is a high temperature nickel based material that could have significant design advantages when compared to austenitic steels in very high temperature reactor applications. Several high temperature design methods, including Section III, Division 5 of the ASME Boiler & Pressure Vessel Code, require a model for the creep and high temperature plastic deformation of a material, quantified as a set of isochronous stress-strain curves. This paper describes the development of a model for the high temperature deformation of Alloy 617. This model is then used to generate design hot tensile and isochronous stress strain curves suitable for use in Section III, Division 5 and other high temperature design methods.

Total Hemispherical Emissivity of Potential Structural Materials for Very High Temperature Reactor Systems: Alloy 617

2018 ◽  
Vol 205 (5) ◽  
pp. 684-693 ◽  
Author(s):  
Kyle L. Walton ◽  
Raymond K. Maynard ◽  
Tushar K. Ghosh ◽  
Robert V. Tompson ◽  
Dabir S. Viswanath ◽  
...  
Keyword(s):  
High Temperature ◽  
Structural Materials ◽  
Alloy 617 ◽  
Very High Temperature Reactor ◽  
High Temperature Reactor ◽  
Total Hemispherical Emissivity ◽  
Very High

Research on Tensile Properties of Ni-Base Super Alloy GH3128

2016 ◽  
Author(s):  
Xi Zhao ◽  
Yu Zhou ◽  
Kun Yuan
Keyword(s):  
High Temperature ◽  
Tensile Properties ◽  
Heat Exchangers ◽  
Compound Fracture ◽  
Very High Temperature Reactor ◽  
High Temperature Reactor ◽  
Very High ◽  
Super Alloy ◽  
Tension Fracture ◽  
Variation Tendency

GH3128, which is one of the domestic Ni-base super alloy, shows good performances under high temperature. Preliminary research has shown that this alloy is promising as structural material for Intermediate Heat Exchangers (IHX), which are the key components of Very High Temperature Reactor (VHTR). In this paper, the tensile properties of GH3128 are tested by the uniaxial tension experiments, and then the fractographic evaluation is conducted by using the scanning electron microscope (SEM). In the paper, the variation tendency of tensile strengths of GH3128 as well as plasticity is described along with the variation of temperature. The results also show that the tension fracture mode will gradually transform from ductile fracture to cleavage-intergranular compound fracture with the increasing of temperature, and the transition of fracture mechanism corresponds well with the variation of alloy plasticity.

scholarly journals Characterization of 2D-C/C Composite for Application of Very High Temperature Reactor(M & M 2009 Conference)

2010 ◽  
Vol 76 (764) ◽  
pp. 383-385 ◽  
Author(s):  
Taiju SHIBATA ◽  
Junya SUMITA ◽  
Taiyo MAKITA ◽  
Takashi TAKAGI ◽  
Eiji KUNIMOTO ◽  
...  
Keyword(s):  
High Temperature ◽  
Special Issue ◽  
Very High Temperature Reactor ◽  
High Temperature Reactor ◽  
Very High

A Techno-Economic Optimization of the Power Conversion System of a Very High Temperature Reactor

2006 ◽  
Author(s):  
Christine Mansilla ◽  
Michel Dumas ◽  
Franc¸ois Werkoff
Keyword(s):  
High Temperature ◽  
Power Conversion ◽  
Minimum Cost ◽  
Production Costs ◽  
Total Production ◽  
Economic Optimization ◽  
Very High Temperature Reactor ◽  
Conversion System ◽  
High Temperature Reactor ◽  
Very High

Generation IV nuclear reactors will not be implemented unless they enable lower production costs than with the current systems. In such a context a techno-economic optimization method was developed and then applied to the power conversion system of a very high temperature reactor. Techno-economic optimization consists in minimizing an objective function that depends on technical variables and economic ones. The advantage of the techno-economic optimization is that it can take into account both investment costs and operating costs. A techno-economic model was implemented in a specific optimization software named Vizir, which is based on genetic algorithms. The calculation of the thermodynamic cycle is performed by a software named Tugaz. The results are the values of the decision variables that lead to a minimum cost, according to the model. The total production cost is evaluated. The influence of the various variables and constraints is also pointed out.

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