A study of Ni-Cu weld metals for joining austenitic stainless steels
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The Ohio State University / OhioLINK
2004
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| Online Access: | http://rave.ohiolink.edu/etdc/view?acc_num=osu1406888576 |
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ndltd-OhioLink-oai-etd.ohiolink.edu-osu14068885762021-08-03T06:26:42Z A study of Ni-Cu weld metals for joining austenitic stainless steels Guaytima, Gustavo M. Engineering Welding of austenitic stainless steels with matching filler metals results in the generation of hexavalent chromium (Cr+6) in the welding fume, which is a known carcinogen. Permissible Exposure Limits (PELs) for this harmful ion are being severely reduced. Monel 60 filler metal (ERNiCu-7) was selected as a potential replacement filler metal for use with Type 304L base metal. This study evaluated the weldability issues associated with Monel 60/Type 304L dissimilar combinations. These included: compatibility, weld cracking susceptibility, microstructure evaluation, mechanical properties, and fume generation. A companion study evaluated the corrosion behavior of this dissimilar combination. Weld cracking was related to dilution of the Monel 60 filler metal by Type 304L base metal. When dilution was maintained below 30% cracking was avoided. The weld microstructure at all dilution levels was fully austenitic with segregation of Cu at the solidification grain boundaries and solidification subgrain boundaries. The mechanical properties of GTAW welds yielded compatible properties to welds made with matching filler metal (ER 308L). The ultimate tensile strength was 80 Ksi, yield strength was about 44 Ksi, while elongation was 44 %. The amount of Cr in the welding fumes during SMAW was reduced by a factor of 20 when comparing Monel 60 to E308-16. 2004 English text The Ohio State University / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=osu1406888576 http://rave.ohiolink.edu/etdc/view?acc_num=osu1406888576 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws. |
| collection |
NDLTD |
| language |
English |
| sources |
NDLTD |
| topic |
Engineering |
| spellingShingle |
Engineering Guaytima, Gustavo M. A study of Ni-Cu weld metals for joining austenitic stainless steels |
| author |
Guaytima, Gustavo M. |
| author_facet |
Guaytima, Gustavo M. |
| author_sort |
Guaytima, Gustavo M. |
| title |
A study of Ni-Cu weld metals for joining austenitic stainless steels |
| title_short |
A study of Ni-Cu weld metals for joining austenitic stainless steels |
| title_full |
A study of Ni-Cu weld metals for joining austenitic stainless steels |
| title_fullStr |
A study of Ni-Cu weld metals for joining austenitic stainless steels |
| title_full_unstemmed |
A study of Ni-Cu weld metals for joining austenitic stainless steels |
| title_sort |
study of ni-cu weld metals for joining austenitic stainless steels |
| publisher |
The Ohio State University / OhioLINK |
| publishDate |
2004 |
| url |
http://rave.ohiolink.edu/etdc/view?acc_num=osu1406888576 |
| work_keys_str_mv |
AT guaytimagustavom astudyofnicuweldmetalsforjoiningausteniticstainlesssteels AT guaytimagustavom studyofnicuweldmetalsforjoiningausteniticstainlesssteels |
| _version_ |
1719436896080232448 |