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Title: Electrochemical polishing of notches

Abstract

An apparatus and method are disclosed for the selective electrochemical polishing of a lateral tip of a deep longitudinal notch in a work piece used to test crack initiation properties of materials. A DC power source is connected to the work piece and to an electrode disposed laterally along the distal end of an insulated body which is inserted in the longitudinal notch. The electrode and distal end of the body are disposed along the tip of the notch, but are spaced from the notch so as to provide a lateral passage for an electrolyte. The electrolyte is circulated through the passage so that the electrolyte only contacts the work piece adjacent the passage. Conveniently, the electrolyte is circulated by use of an inlet tube and an outlet tube provided at opposite ends of the passage. These tubes are preferably detachably located adjacent the ends of the passage and suitable seals are provided. A holding device including arms to which the tubes are attached is conveniently used to rapidly and easily locate the test specimen with the passage aligned with the tubes. The electrode is preferably a wire which is located in grooves along the distal end of the insulatedmore » body and up one side of the body or a plastic sheath insulated thin metal strip.« less

Inventors:
 [1];  [1]
  1. (Scotia, NY)
Issue Date:
Research Org.:
Knolls Atomic Power Laboratory (KAPL), Niskayuna, NY
OSTI Identifier:
866849
Patent Number(s):
4806216
Assignee:
United States of America as represented by United States (Washington, DC) KAPL
DOE Contract Number:  
AC12-76SN00052
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
electrochemical; polishing; notches; apparatus; method; disclosed; selective; lateral; tip; deep; longitudinal; notch; piece; crack; initiation; properties; materials; dc; power; source; connected; electrode; disposed; laterally; distal; insulated; inserted; spaced; provide; passage; electrolyte; circulated; contacts; adjacent; conveniently; inlet; tube; outlet; provided; opposite; tubes; preferably; detachably; located; suitable; seals; holding; device; including; arms; attached; rapidly; easily; locate; specimen; aligned; wire; grooves; plastic; sheath; metal; strip; dc power; power source; device including; located adjacent; electrode disposed; metal strip; electrochemical polishing; inlet tube; /205/204/

Citation Formats

Kephart, Alan R., and Alberts, Alfred H. Electrochemical polishing of notches. United States: N. p., 1989. Web.
Kephart, Alan R., & Alberts, Alfred H. Electrochemical polishing of notches. United States.
Kephart, Alan R., and Alberts, Alfred H. Sun . "Electrochemical polishing of notches". United States. https://www.osti.gov/servlets/purl/866849.
@article{osti_866849,
title = {Electrochemical polishing of notches},
author = {Kephart, Alan R. and Alberts, Alfred H.},
abstractNote = {An apparatus and method are disclosed for the selective electrochemical polishing of a lateral tip of a deep longitudinal notch in a work piece used to test crack initiation properties of materials. A DC power source is connected to the work piece and to an electrode disposed laterally along the distal end of an insulated body which is inserted in the longitudinal notch. The electrode and distal end of the body are disposed along the tip of the notch, but are spaced from the notch so as to provide a lateral passage for an electrolyte. The electrolyte is circulated through the passage so that the electrolyte only contacts the work piece adjacent the passage. Conveniently, the electrolyte is circulated by use of an inlet tube and an outlet tube provided at opposite ends of the passage. These tubes are preferably detachably located adjacent the ends of the passage and suitable seals are provided. A holding device including arms to which the tubes are attached is conveniently used to rapidly and easily locate the test specimen with the passage aligned with the tubes. The electrode is preferably a wire which is located in grooves along the distal end of the insulated body and up one side of the body or a plastic sheath insulated thin metal strip.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1989},
month = {1}
}

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