June 28, 2015 to July 2, 2015
JW Marriott Starr Pass Resort
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Tensile properties and conductivities of a precipitation hardened and cold-rolled Cu-0.3Cr-0.1Zr alloy at cryogenic temperature

Jun 30, 2015, 5:30 PM
Tucson Ballroom CD

Tucson Ballroom CD

Contributed Oral Presentation ICMC-11 - Metallic and Composite Materials M2OrD - Cryogenic Materials V: Structural Materials


Prof. Osamu Umezawa (Yokohama National University)


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 cold-rolled condition (in: Handbook of Superconductivity and Cryogenics, Ohmsha, Tokyo, 1993), since few cryogenic data for those alloys were available. Cu-0.3%Cr-0.1%Zr alloy (CuCrZr) is one of typical precipitation hardened copper-based alloys, and exhibited an excellent combination of high strength and high electrical conductivity at the temperature range of 4 K to 300 K. The CuCrZr showed higher yield ratio (yield stress/tensile strength) at cryogenic temperature than oxygen free copper (OFC), but the ratio of yield stress to electrical resistivity was lower than. The thermal conductivity of CuCrZr was twice as high as that of phosphorous-deoxidized copper. The CuCrZr exhibited excellent non-magnetic stability and very low magnetic permeability at 4.2 K.

Primary author

Prof. Osamu Umezawa (Yokohama National University)

Presentation materials