Title:
疲労亀裂の進展抑制ペースト、進展抑制方法、進展検出ペースト、及び進展検出方法
Document Type and Number:
Japanese Patent JP7333934
Kind Code:
B2
Abstract:
To provide: a progression suppressing paste for fatigue crack which is high in viscosity on a place having no fatigue crack and extremely low shearing speed and becomes low in viscosity on the place where a shearing speed increases accompanying occurrence or propagation of fatigue crack, or opening/closing behavior thereof; a progression detecting paste; a progression suppressing method for fatigue crack; and a progression detecting method.SOLUTION: A progression suppressing paste for fatigue crack is characterized in that the paste is a paste 2 having a thixotropy not to droop down by empty weight; a paste grain has a diameter of 20 μm or less; the thixotropy index TI of the paste is 0.3 to 1.6; and the apparent viscosity ηof the paste is made to be 88(Pa s) or more when the shearing speed is 0.1(1/s) and 13 to 490(Pa s) when that speed is 1(1/s).SELECTED DRAWING: Figure 1
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Inventors:
Ichibiko Takahashi
Application Number:
JP2019066089A
Publication Date:
August 28, 2023
Filing Date:
March 29, 2019
Export Citation:
Assignee:
National Maritime Research Institute, National Maritime Research Institute
International Classes:
B23P6/00; B23P6/04; G01N3/32; G01N21/88; G01N21/91
Domestic Patent References:
| JP200528462A | ||||
| JP201193041A | ||||
| JP2010275707A | ||||
| JP2013129057A |
Other References:
高橋一比古,外4名,“アルミナペースト塗布による疲労き裂進展の自動抑制および目視検出”,溶接学会論文集,一般社団法人溶接学会,平成16年4月,第22巻,第4号,p.531-541
Attorney, Agent or Firm:
Shinichi Abe
Takaaki Ota
Takaaki Ota