Statistical Research of Ilmenite Type Arc Welding Electrodes (Report 2)
Distribution of Fisheyes and Correlation between Fisheye and Tensile Properties
1956 Volume 25 Issue 11 Pages 601-608
Details
1956 Volume 25 Issue 11 Pages 601-608
On the tensile test specimens of ilmenite type arc welding electrodes for mild steele (4 and 5mm dia) which were tested in accordance with JIS G 3524 in the Report 1 authors further analysed statistically distribution of fisheyes and correlation between fisheye and tensile properties. The results are summarized:
1. If the size of fisheye is indicated by the diameter which is derived from the total area of all fisheyes, found in a fractured surface of test specimen, distribution of fisheyes and correlation between size of fisheye and tensile properties can be fairly well represented.
2. In very few electrodes, fisheyes are absent, and there is a slight stronger tendency for 5mm dla to develop fisheyes than 4mm dia.
3. There is an evident negative correlation between fisheye and elongation or reduction of area, but a less evident such relation, between fisheye and tensile strength or yield point. These correlations clearly indicated especially with contour ellipses.
