TY - JOUR
T1 - Fracture toughness evaluation of YBCO bulk superconductor
AU - Okudera, T.
AU - Murakami, A.
AU - Katagiri, K.
AU - Kasaba, K.
AU - Shoji, Y.
AU - Noto, K.
AU - Sakai, N.
AU - Murakami, M.
N1 - Funding Information:
We appreciate helpful assistance in the experiment by K. Sasaki of Iwate University. This work was partly supported by Japan Science and Technology Corporation under the Joint-research Project for Regional Intensive in Iwate Prefecture on “Development of practical applications of magnetic field technology for use in the region and in everyday living” and also partly supported by NEDO.
Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2003/10
Y1 - 2003/10
N2 - Evaluation of the fracture toughness of a Y-Ba-Cu-O bulk superconductor with 28.6 mol% Y-211 and 15 wt.% Ag has been investigated by tensile tests at room temperature using specimens with a sharp V-notch. The notch was introduced into the specimens such that its direction of depth was parallel or perpendicular to the c-axis and the loading direction was in the a(b)-axis. Fracture toughness evaluation by three-point bending tests was also carried out. In addition, usual tensile tests and three-point bending tests were also carried out in the specimens without V-notch. The scatter of measured fracture toughness values by the bending tests, 1.6-2.1 MPa m1/2, was less as compared with that by the tensile tests, 1.1-2.5 MPa m1/2. However, the average value in tensile tests 1.9 MPa m1/2 coincided with that in bending tests. The maximum and the average value of bending strength, 109 and 104 MPa, were higher than those of tensile strength, 72 and 56 MPa, respectively.
AB - Evaluation of the fracture toughness of a Y-Ba-Cu-O bulk superconductor with 28.6 mol% Y-211 and 15 wt.% Ag has been investigated by tensile tests at room temperature using specimens with a sharp V-notch. The notch was introduced into the specimens such that its direction of depth was parallel or perpendicular to the c-axis and the loading direction was in the a(b)-axis. Fracture toughness evaluation by three-point bending tests was also carried out. In addition, usual tensile tests and three-point bending tests were also carried out in the specimens without V-notch. The scatter of measured fracture toughness values by the bending tests, 1.6-2.1 MPa m1/2, was less as compared with that by the tensile tests, 1.1-2.5 MPa m1/2. However, the average value in tensile tests 1.9 MPa m1/2 coincided with that in bending tests. The maximum and the average value of bending strength, 109 and 104 MPa, were higher than those of tensile strength, 72 and 56 MPa, respectively.
KW - Bending test
KW - Fracture toughness
KW - Tensile test
KW - Y-Ba-Cu-O bulk
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U2 - 10.1016/S0921-4534(03)00996-1
DO - 10.1016/S0921-4534(03)00996-1
M3 - Conference article
AN - SCOPUS:0042784822
VL - 392-396
SP - 628
EP - 633
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
SN - 0921-4534
IS - PART 1
T2 - Proceedings of the 15th International Symposium on Superconduc
Y2 - 11 November 2002 through 13 November 2002
ER -