[en] The papers contained in this volume provide an overview of recent advances in low-temperature materials science and technology. Topics discussed include general superconductor theory, measurement, and processing; low temperature superconductors Nb3Sn, NbTi, and newer materials; high-temperature superconductors, including YBCO, Bi-based materials, and other ceramics; and pure metal cryoconductors. The discussion also covers magnetic materials, composites, and metals, including aluminum, copper, titanium alloys, and austenitic and ferritic steels

[en] Contained in this volume (Volume 1 of 2) are papers concerned with advances in the field of cryogenic engineering taken from the Proceedings of the Ninth International Cryogenic Materials Conference, held June 11-14, 1991, in Huntsville, Alabama. The focus of the papers presented here is on materials (superconductors are addressed in the second volume) for cryogenic engineering. The papers are assigned to the following categories: structural alloys, weldments of structural alloys, creep of structural alloys, radiation effects on materials, special-use materials, mechanical properties of resins, and mechanical properties of composites. Author abstracts are provided for each paper

[en] The reports presented here summarize the work of the low temperature materials research project for the first year of the program. The various projects are outlined and the research results are presented. The major thrust of the measurements has been the evaluation of the low temperature properties of stainless steel base metal and welds, with particular emphasis on the nitrogen strengthened stainless steels. Some initial work has also been done on the production and properties of nonmetallics, primarily industrial laminates, for low temperature applications. A handbook of material properties is also planned. A survey of low temperature materials needs and problems related to magnetic fusion energy, performed by NBS as groundwork for the program, is included as is a brief description of the first workshop held in October 1977

[en] This book contains reprints of the Proceedings of the Ninth International Cryogenic Materials Conference (ICMC), held June 11--14, 1991, in Huntsville, Alabama. This second volume of the two-volume set contains papers broadly categorized as superconductors. The papers are grouped into the following subcategories: superconductivity reviews; general superconductor theory, measurement, and processing; low-temperature superconductors -- Nb₃Sn; low-temperature superconductors -- Nb-Ti; low-temperature superconductors -- new materials; high-temperature superconductors -- YBCO; high-temperature superconductors -- Bi-based; cryoconductors, capacitors, and magnetic materials. An author index, materials index, and subject index are provided at the end of this volume

[en] Specific heat values between 2 and 20⁰K are reported for the two stainless steels AISI 304 and AISI 304L. Measurements were made by standard adiabatic calorimetry. The results suggest that the thermal properties are comparable to AISI 310S, but the absence of magnetic clusters implies that these materials are more appropriate in low temperature applications where magnetic properties are critical

[en] Results of low-temperature resistivity, magnetoresistivity, and magnetic susceptibility measurements on CuSn and CuNi alloys of compositions commonly used in practical superconductors are presented and discussed. (author)

[en] Insuring structural integrity of large superconducting magnet systems requires knowledge of the low temperature behavior of many materials. This review describes recent research on alloys, nonmetallics and conductor composites related to their structural roles in these magnets. Special attention is paid to joining methods and their effect on the structure. It is encouraging to note that a reasonable amount of data are now available on a number of commercial alloys. It is somewhat disconcerting to see a rapid increase in design stress levels over the past several years, during which time few large magnets have been put into operation. 30 refs

[en] The magnetic properties of the austenitic stainless steels are discussed. Problems with using the permeability as a design parameter at low temperatures are outlined. Data are presented for very low field susceptibility and remanent magnetization of a large number of stainless steels measured at room temperature and at 4⁰K with a SQUID Magnetometer System

[en] The results of preliminary measurements using a SQUID (Superconducting Quantum Interference Device) system to determine the magnetic near field of commercial eddy current coils are presented. The minimum coil size and the fineness of the grid is limited by the dexterity of the coil winder for wire-wound coils. Other techniques such as photolithography might extend this range somewhat, but eventually the inductance of the leads necessary to transmit the signal down into the helium environment will limit the S/N that can be achieved. A problem at present is the limited frequency range of the commercial SQUID system. However, experimental models with a frequency range well into the MHz range have been made. It is indicated that there will be no insurmountable problems in eventually producing a commercial device

[en] A general review of recent worldwide developments in the measurement of properties of materials used in structural applications at cryogenic temperatures is given. New alloys data and testing methods, particularly relating to crack growth, are discussed. The major emphasis is placed on the properties of a variety of composite materials now under consideration for various applications at low temperatures. Insulation materials and others which occasionally serve a structural purpose are also considered. An attempt is made to evaluate trends in these materials. Much of the literature in this field is contained in relatively obscure government reports and corporate publications. A brief bibliography is given as well as a guide to other sources of this literature. (author)