scholarly journals A COMPILATION OF ROOM TEMPERATURE AND 1200 F PROPERTIES OF METALLIC MATERIALS WITH SPECIFIC REFERENCE TO THEIR USE AS FUEL CLADDING IN SODIUM COOLED THERMAL REACTORS

1960 ◽  
Author(s):  
H E Kline
Keyword(s):  
Room Temperature ◽  
Specific Reference ◽  
Metallic Materials ◽  
Fuel Cladding

Processing Different Magnesium Alloys through HPT

2014 ◽  
Vol 783-786 ◽  
pp. 2617-2622 ◽  
Author(s):  
Livia Raquel C. Malheiros ◽  
Roberto B. Figueiredo ◽  
Terence G. Langdon
Keyword(s):  
Plastic Deformation ◽  
High Pressure ◽  
Magnesium Alloys ◽  
Room Temperature ◽  
High Pressure Torsion ◽  
Structure Refinement ◽  
Hardness Distribution ◽  
Metallic Materials ◽  
Processing Conditions ◽  
Significant Structure

High-Pressure Torsion (HPT) is widely used to refine the structure of metallic materials through the use of severe plastic deformation. This technique is used in this report to process different magnesium alloys using various processing conditions. The high hydrostatic pressure allows processing of these materials at room temperature without cracking. The structure was characterized and hardness distribution was determined at different areas of the processed samples. The results show significant structure refinement and increased hardness. The evolution of the structure and hardness depends on the alloying and HPT processing conditions.

scholarly journals Applicability of Swaging as an Alternative for the Fabrication of Accident-Tolerant Fuel Cladding

Energies ◽  
2020 ◽  
Vol 13 (12) ◽  
pp. 3182 ◽  
Author(s):  
Dae Yun Kim ◽  
You Na Lee ◽  
Joon Han Kim ◽  
Yonghee Kim ◽  
Young Soo Yoon
Keyword(s):  
Room Temperature ◽  
Interface Structure ◽  
Fuel Cladding ◽  
Spectroscopy Analysis ◽  
Physical Force ◽  
X Ray ◽  
Scale Thickness ◽  
Coating Methods ◽  
Feasible Alternative ◽  
Microscopy Images

We suggest an alternative to conventional coating methods for accident-tolerant fuel (ATF) cladding. A Zircaloy-4 tube was inserted into metal tubes of different materials and the inserted tubes were subjected to physical force at room temperature. The manufactured tube exhibited a pseudo-single tube (PST) structure and had higher thermal stability than a Zircaloy-4 tube. Optical microscopy and scanning electron microscopy images showed that the PST had a uniform and well-bonded interface structure, i.e., no gaps or voids were found at the interface between the inner and outer tubes. Energy-dispersive X-ray spectroscopy analysis confirmed that the metal components did not interdiffuse at the interface of the PST, even after being kept at 600 and 900 °C for 1 h and rapidly cooled to room temperature. Unlike pure Zircaloy-4 tubes, Zircaloy-4/stainless use steel (SUS) 316 PST did not show significant structural collapse, even after being stored at 1200 °C for 1 h. Based on these results, if a PST was fabricated using a Zircaloy-4 tube thinner than the Zircaloy-4 tube used in this study and an outer tube of micron-scale thickness, swaging may be a feasible alternative to Zircaloy-4-based ATF cladding.

The effect of molybdenum on titanium’s castability in dental prosthesis applications: A numerical analysis

2018 ◽  
Vol 233 (10) ◽  
pp. 1966-1971 ◽  
Author(s):  
Volkan Kovan ◽  
Tugce Tezel ◽  
Eyup Sabri Topal
Keyword(s):  
Room Temperature ◽  
Pure Titanium ◽  
Low Density ◽  
Metallic Materials ◽  
Commercially Pure Titanium ◽  
High Melting ◽  
Dental Prostheses ◽  
High Melting Temperature ◽  
Commercially Pure ◽  
Potential Use

The ISO 22674 standard categorizes metallic materials that are suitable for dental appliances and restoration fabrication. Nickel, cadmium, and beryllium are classified as hazardous elements in this international standard. However, many alloys containing nickel and beryllium are used in dentistry as biomedical metallic materials. Numerous studies on the toxicity of nickel and beryllium have led to serious doubts about the biological reliability of these alloys. Titanium therefore attracts great interest due to its potential use in dental prostheses. Commercially pure titanium has biocompatibility, low density, great corrosion resistance, and mechanical strength at room temperature. In spite of its numerous desirable properties, it is hard to cast titanium because of its high melting temperature. In this study, the microstructure and castability of binary Ti–Mo alloys (2%, 4%, 6%, 8%) was investigated using numerical methods to evaluate their potential use in dentistry. ProCAST software was used to model the casting behavior.

Application of High Pressure Torsion to Bulk Samples

2006 ◽  
Vol 503-504 ◽  
pp. 391-398 ◽  
Author(s):  
Genki Sakai ◽  
Katsuaki Nakamura ◽  
Z. Horita ◽  
Terence G. Langdon
Keyword(s):  
High Pressure ◽  
Tensile Testing ◽  
Room Temperature ◽  
High Pressure Torsion ◽  
Initial Strain Rate ◽  
Thin Disk ◽  
Metallic Materials ◽  
Grain Sizes ◽  
Angular Pressing ◽  
Cylindrical Samples

High pressure torsion (HPT) is a well-known procedure to impart severe plastic deformation (SPD) into metallic materials. It was reported that HPT produces grain sizes finer than those using other SPD processes such as equal-channel angular pressing (ECAP). However, the application of HPT has been restricted to thin disk samples. In this study, an HPT process was developed for use with bulk samples. This process is designated as Bulk-HPT for comparison with conventional Disk-HPT. Cylindrical samples of an Al-3%Mg-0.2%Sc alloy having dimensions of 10 mm in diameter and 8.6 mm in height were prepared for Bulk-HPT. The samples were strained under a pressure of 1 GPa for 2 turns at room temperature. Microstructural observations revealed that the samples contained regions having a grain size of ~130 nm. Tensile testing showed a superplastic ductility ~480 % at 673 K with an initial strain rate of 3.3x10-2 s-1.

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