Links for fulltext
(May Require Subscription)
- Publisher Website: 10.1016/j.matdes.2015.03.052
- Scopus: eid_2-s2.0-84927133047
- WOS: WOS:000352696100016
- Find via
Supplementary
- Citations:
- Appears in Collections:
Article: Friction-stir welding of ultrafine grained austenitic 304L stainless steel produced by martensitic thermomechanical processing
Title | Friction-stir welding of ultrafine grained austenitic 304L stainless steel produced by martensitic thermomechanical processing |
---|---|
Authors | |
Keywords | Austenitic stainless steel EBSD Friction stir welding Recrystallization mechanism Sigma phase precipitation Ultrafine grain |
Issue Date | 2015 |
Publisher | Elsevier Ltd. The Journal's web site is located at http://www.elsevier.com/locate/matdes |
Citation | Materials & Design, 2015, v. 76, p. 130-140 How to Cite? |
Abstract | An ultrafine grained 304L austenitic stainless steel was produced by martensitic thermomechanical processing and joined by applying Friction Stir Welding (FSW). The thermomechanical processing comprised a cold roll procedure up to 80% reduction followed by annealing. After FSW, different grain structures in different regions of the weld nugget were observed due to the asymmetry in the heat generation during the welding process. Grain growth was found to be the most predominant phenomena in the region just ahead of the rotating tool during the thermal cycle of FSW. A banded structure was observed in the advancing side of the weld nugget. TEM observations revealed that nanometric sigma phase precipitates were present both in the grain boundaries and inside the grains of this region. Shear textures were clearly identified in the weld center. The lack of rotated cube texture shows that the discontinuous dynamic recrystallization (DDRX) is not active in the final microstructure. Increasing the welding speed can reduce the final grain size of the weld nugget leading to higher hardness. Hardness is found to increase in the weld and this is not just a grain refinement effect, but also due to the presence of sub-boundaries and a high density of dislocations. |
Persistent Identifier | http://hdl.handle.net/10722/211564 |
ISSN | 2023 Impact Factor: 7.6 2023 SCImago Journal Rankings: 1.684 |
ISI Accession Number ID |
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Sabooni, S | - |
dc.contributor.author | Karimzadeh, F | - |
dc.contributor.author | Enayati, MH | - |
dc.contributor.author | Ngan, AHW | - |
dc.date.accessioned | 2015-07-20T01:43:12Z | - |
dc.date.available | 2015-07-20T01:43:12Z | - |
dc.date.issued | 2015 | - |
dc.identifier.citation | Materials & Design, 2015, v. 76, p. 130-140 | - |
dc.identifier.issn | 0264-1275 | - |
dc.identifier.uri | http://hdl.handle.net/10722/211564 | - |
dc.description.abstract | An ultrafine grained 304L austenitic stainless steel was produced by martensitic thermomechanical processing and joined by applying Friction Stir Welding (FSW). The thermomechanical processing comprised a cold roll procedure up to 80% reduction followed by annealing. After FSW, different grain structures in different regions of the weld nugget were observed due to the asymmetry in the heat generation during the welding process. Grain growth was found to be the most predominant phenomena in the region just ahead of the rotating tool during the thermal cycle of FSW. A banded structure was observed in the advancing side of the weld nugget. TEM observations revealed that nanometric sigma phase precipitates were present both in the grain boundaries and inside the grains of this region. Shear textures were clearly identified in the weld center. The lack of rotated cube texture shows that the discontinuous dynamic recrystallization (DDRX) is not active in the final microstructure. Increasing the welding speed can reduce the final grain size of the weld nugget leading to higher hardness. Hardness is found to increase in the weld and this is not just a grain refinement effect, but also due to the presence of sub-boundaries and a high density of dislocations. | - |
dc.language | eng | - |
dc.publisher | Elsevier Ltd. The Journal's web site is located at http://www.elsevier.com/locate/matdes | - |
dc.relation.ispartof | Materials & Design | - |
dc.rights | This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License | - |
dc.subject | Austenitic stainless steel | - |
dc.subject | EBSD | - |
dc.subject | Friction stir welding | - |
dc.subject | Recrystallization mechanism | - |
dc.subject | Sigma phase precipitation | - |
dc.subject | Ultrafine grain | - |
dc.title | Friction-stir welding of ultrafine grained austenitic 304L stainless steel produced by martensitic thermomechanical processing | - |
dc.type | Article | - |
dc.identifier.email | Ngan, AHW: hwngan@hku.hk | - |
dc.identifier.authority | Ngan, AHW=rp00225 | - |
dc.description.nature | postprint | - |
dc.identifier.doi | 10.1016/j.matdes.2015.03.052 | - |
dc.identifier.scopus | eid_2-s2.0-84927133047 | - |
dc.identifier.hkuros | 244364 | - |
dc.identifier.volume | 76 | - |
dc.identifier.spage | 130 | - |
dc.identifier.epage | 140 | - |
dc.identifier.isi | WOS:000352696100016 | - |
dc.publisher.place | United Kingdom | - |
dc.identifier.issnl | 0264-1275 | - |