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Title: Impact of tool wear on joint strength in friction stir spot welding of DP 980 steel

Abstract

Friction stir spot welding has been shown to be a viable method of joining ultra high strength steel (UHSS), both in terms of joint strength and process cycle time. However, the cost of tooling must be reasonable in order for this method to be adopted as an industrial process. Recently a new tool alloy has been developed, using a blend of PCBN and tungsten rhenium (W-Re) in order to improve the toughness of the tool. Wear testing results are presented for two of these alloys: one with a composition of 60% PCBN and 40% W-Re, and one with 70% PCBN and 30% W-Re. The sheet material used for all wear testing was 1.4 mm DP 980. Lap shear testing was used to show the relationship between tool wear and joint strength. The Q70 tool provided the best combination of wear resistance and joint strength.

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1026600
Report Number(s):
PNNL-SA-79756
Journal ID: ISSN 1362-1718; VT0505000; TRN: US201120%%929
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
Science and Technology of Welding and Joining, 16(7):642-647
Additional Journal Information:
Journal Volume: 16; Journal Issue: 7; Journal ID: ISSN 1362-1718
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALLOYS; FRICTION; RHENIUM; SHEAR; STEELS; TESTING; TUNGSTEN; WEAR RESISTANCE; WELDING; friction stir welding; wear; friction

Citation Formats

Miles, Michael, Ridges, Chris, Hovanski, Yuri, Peterson, Jeremy, Santella, M. L., and Steel, Russel. Impact of tool wear on joint strength in friction stir spot welding of DP 980 steel. United States: N. p., 2011. Web. doi:10.1179/1362171811Y.0000000047.
Miles, Michael, Ridges, Chris, Hovanski, Yuri, Peterson, Jeremy, Santella, M. L., & Steel, Russel. Impact of tool wear on joint strength in friction stir spot welding of DP 980 steel. United States. doi:10.1179/1362171811Y.0000000047.
Miles, Michael, Ridges, Chris, Hovanski, Yuri, Peterson, Jeremy, Santella, M. L., and Steel, Russel. Wed . "Impact of tool wear on joint strength in friction stir spot welding of DP 980 steel". United States. doi:10.1179/1362171811Y.0000000047.
@article{osti_1026600,
title = {Impact of tool wear on joint strength in friction stir spot welding of DP 980 steel},
author = {Miles, Michael and Ridges, Chris and Hovanski, Yuri and Peterson, Jeremy and Santella, M. L. and Steel, Russel},
abstractNote = {Friction stir spot welding has been shown to be a viable method of joining ultra high strength steel (UHSS), both in terms of joint strength and process cycle time. However, the cost of tooling must be reasonable in order for this method to be adopted as an industrial process. Recently a new tool alloy has been developed, using a blend of PCBN and tungsten rhenium (W-Re) in order to improve the toughness of the tool. Wear testing results are presented for two of these alloys: one with a composition of 60% PCBN and 40% W-Re, and one with 70% PCBN and 30% W-Re. The sheet material used for all wear testing was 1.4 mm DP 980. Lap shear testing was used to show the relationship between tool wear and joint strength. The Q70 tool provided the best combination of wear resistance and joint strength.},
doi = {10.1179/1362171811Y.0000000047},
journal = {Science and Technology of Welding and Joining, 16(7):642-647},
issn = {1362-1718},
number = 7,
volume = 16,
place = {United States},
year = {2011},
month = {9}
}