Evaluation of Internal Brushing on Pinch Weld Quality

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Post machining operations such as borescope inspection can cause linear indications down the length of the bore of fill stems. Often these indications are removed or obscured using rotary wire brushing. This study evaluated the effect this mechanical operation may have on pinch weld quality when relatively cold welds were made. A total of four stems with two levels of brushing of both Type 304L and 21-6-9 stainless steels were tested. In addition, two each of the Type 304L stems were Nitradd cleaned and the other two were aqueously cleaned; all four 21-6-9 stems were aqueously cleaned. All of the ... continued below

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Korinko, P December 1, 2005.

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Post machining operations such as borescope inspection can cause linear indications down the length of the bore of fill stems. Often these indications are removed or obscured using rotary wire brushing. This study evaluated the effect this mechanical operation may have on pinch weld quality when relatively cold welds were made. A total of four stems with two levels of brushing of both Type 304L and 21-6-9 stainless steels were tested. In addition, two each of the Type 304L stems were Nitradd cleaned and the other two were aqueously cleaned; all four 21-6-9 stems were aqueously cleaned. All of the brushed stem areas exhibited more surface anomalies based on borescope evaluation. On average, the bond rating was a higher value (worse) for the brushed areas than the unadulterated areas for both Type 304L and 21-6-9 stems. The test method used may have biased the results towards a lesser quality bond for the brushed areas so additional testing is recommended.

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  • Report No.: WSRC-TR-2005-00436
  • Grant Number: DE-AC09-96SR18500
  • DOI: 10.2172/891768 | External Link
  • Office of Scientific & Technical Information Report Number: 891768
  • Archival Resource Key: ark:/67531/metadc873123

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Office of Scientific & Technical Information Technical Reports

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  • December 1, 2005

Added to The UNT Digital Library

  • Sept. 21, 2016, 2:29 a.m.

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  • Nov. 2, 2016, 12:49 p.m.

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Korinko, P. Evaluation of Internal Brushing on Pinch Weld Quality, report, December 1, 2005; [Aiken, South Carolina]. (digital.library.unt.edu/ark:/67531/metadc873123/: accessed December 13, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.