Conveners
M2OrD - Cryogenic Materials V: Structural Materials
- Vittorio Parma (CERN)
- Dick Reed (Cryogenic Materials, Inc.)
Yoshinori Ono
(National Institute for Materials Science)
6/30/15, 4:00 PM
ICMC-11 - Metallic and Composite Materials
Contributed Oral Presentation
High-cycle fatigue properties of Alloy 718 plates were investigated at 77 K in this study. Two plates were used and had a normal-grained and a bimodal-grained (BG) microstructure, respectively. Regarding the normal-grained plate, we prepared two specimens that had different grain sizes by controlling solution-treatment conditions. One had a fine-grained (FG) microstructure and its mean grain...
Robert Walsh
(Florida State University)
6/30/15, 4:15 PM
ICMC-11 - Metallic and Composite Materials
Contributed Oral Presentation
The ITER Central Solenoid (CS) coils utilize cable-in-conduit conductor (CICC) and the conduit alloy is JK2LB. The production grade conduit alloy (and it’s welds) must meet strict requirements for strength, toughness, fatigue crack resistance, and fabricability. The conduit alloy must retain good mechanical properties after additional fabrication steps such as welding, coil winding strain and...
Dr
Jan Sas
(The Karlsruhe Institute of Technology)
6/30/15, 4:30 PM
ICMC-14 - Cryogenic Materials Testing and Methods
Contributed Oral Presentation
Due to the increasing demand onperformance for all materials used in superconducting magnet systems possibilities of increasing the mechanical performance of austenitic stainless steel is investigated. Especially at cryogenic conditions e.g. at liquid Helium temperature a variety of superconducting applications are realized.
The aim of this work is to investigate the mechanical properties of...
Dr
Arman Nyilas
(Cryogenic Engineering & Materials Expertise)
6/30/15, 4:45 PM
ICMC-11 - Metallic and Composite Materials
Contributed Oral Presentation
Fracture toughness of a forging material Nitronic 50 (ASTM A182 F XM-19) was investigated at 4.2 K. The L-T and L-S specimens were used in this study. The expected directions of crack propagation for these specimens are parallel to the width (long transverse) direction and the thickness (short transverse) direction, respectively. In the fatigue pre-cracking for both specimens and J-tests of...
Dr
Ida Westermann
(Norwegian University of Science and Technology)
6/30/15, 5:00 PM
ICMC-11 - Metallic and Composite Materials
Contributed Oral Presentation
Fracture analysis of a standard construction steel ship deck, which had been exposed to a liquid nitrogen spill, showed that the brittle fracture started at a flaw in the weld as a consequence of low-temperature embrittlement and thermal stresses experienced by the material. In the present study, the permanent effect of a cryogenic spill on the fracture properties of carbon steels has been...
Toshio OGATA
(National Institute for Materials Science)
6/30/15, 5:15 PM
ICMC-11 - Metallic and Composite Materials
Contributed Oral Presentation
Hydrogen environment embrittlement (HEE) on austenitic stainless steels SUS304, 304L, and 316L in the high pressure hydrogen gas was evaluated from ambient temperature to 20 K using a very simple mechanical properties testing procedure. In the method, the high-pressure hydrogen environment is produced just inside the hole in the specimen and the specimen is cooled in a cooled-alcohol dewar and...
Prof.
Osamu Umezawa
(Yokohama National University)
6/30/15, 5:30 PM
ICMC-11 - Metallic and Composite Materials
Contributed Oral Presentation
The National Research Institute for Metals (NRIM: now NIMS) has accumulated physical and mechanical properties at cryogenic temperatures for structural alloys since 1980s. As a part of the work, electrical resistivity, magnetization, thermal conductivity and tensile properties were determined at cryogenic temperatures for precipitation hardened copper-based alloys as well as OFHC Cu in the...
Prof.
Jiangtao Li
(Technical Institute of Physics and Chemistry, Chinese Academy of Sciences)
6/30/15, 5:45 PM
ICMC-11 - Metallic and Composite Materials
Contributed Oral Presentation
High-entropy alloys consist of multiple elements with different crystal structures but can crystallize as a single phase. Recently, we developed a new technique to prepare high-entropy alloys, which is called high-gravity combustion synthesis. In the new technique, high-entropy alloys are produced by rapid solidification of hot melts from highly-exothermic aluminothermic reactions....
