Accelerating globularization in additively manufactured Ti-6Al-4V by exploiting martensitic laths
Ti-6Al-4V alloy has limitations in terms of globularization when using additive manufacturing (AM), which requires a final forging step. To optimize this approach, this study investigated the effect of processing variables on the dynamic/static globularization of AM-processed Ti-6Al-4V alloy. Eight...
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| Format: | Article |
| Language: | English |
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Elsevier
2021-05-01
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| Series: | Journal of Materials Research and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785421002143 |
| _version_ | 1819090892685836288 |
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| author | In-Su Kim Jeong Mok Oh Sang Won Lee Jong-Taek Yeom Jae-Keun Hong Chan Hee Park Taekyung Lee |
| author_facet | In-Su Kim Jeong Mok Oh Sang Won Lee Jong-Taek Yeom Jae-Keun Hong Chan Hee Park Taekyung Lee |
| author_sort | In-Su Kim |
| collection | DOAJ |
| description | Ti-6Al-4V alloy has limitations in terms of globularization when using additive manufacturing (AM), which requires a final forging step. To optimize this approach, this study investigated the effect of processing variables on the dynamic/static globularization of AM-processed Ti-6Al-4V alloy. Eight double-cone specimens were prepared with different processing variables such as effective strain, solution treatment, hot-forging temperature, and subsequent annealing. Microstructural evolutions were quantitatively characterized to interpret the kinetics of globularization based on the aforementioned variables. In particular, the combination of solution treatment, low-temperature (1073 K) forging, and subsequent annealing significantly accelerated the overall globularization. Such an accelerating effect stemmed from the reduced path for boundary splitting in fine α′ martensitic laths, which was induced via solution treatment. This accelerating effect disappeared at a high temperature (1223 K), which implies the necessity of optimizing the thermomechanical route to exploit martensitic laths. |
| first_indexed | 2024-12-21T22:31:03Z |
| format | Article |
| id | doaj.art-fe79493117804f2a8b48825a93969e89 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-12-21T22:31:03Z |
| publishDate | 2021-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-fe79493117804f2a8b48825a93969e892022-12-21T18:48:06ZengElsevierJournal of Materials Research and Technology2238-78542021-05-0112304315Accelerating globularization in additively manufactured Ti-6Al-4V by exploiting martensitic lathsIn-Su Kim0Jeong Mok Oh1Sang Won Lee2Jong-Taek Yeom3Jae-Keun Hong4Chan Hee Park5Taekyung Lee6School of Mechanical Engineering, Pusan National University, Busan, 46241, Republic of Korea; Advanced Metals Division, Korea Institute of Materials Science, Changwon, 51508, Republic of KoreaAdvanced Metals Division, Korea Institute of Materials Science, Changwon, 51508, Republic of KoreaAdvanced Metals Division, Korea Institute of Materials Science, Changwon, 51508, Republic of KoreaAdvanced Metals Division, Korea Institute of Materials Science, Changwon, 51508, Republic of KoreaAdvanced Metals Division, Korea Institute of Materials Science, Changwon, 51508, Republic of KoreaAdvanced Metals Division, Korea Institute of Materials Science, Changwon, 51508, Republic of Korea; Corresponding author.School of Mechanical Engineering, Pusan National University, Busan, 46241, Republic of Korea; Corresponding author.Ti-6Al-4V alloy has limitations in terms of globularization when using additive manufacturing (AM), which requires a final forging step. To optimize this approach, this study investigated the effect of processing variables on the dynamic/static globularization of AM-processed Ti-6Al-4V alloy. Eight double-cone specimens were prepared with different processing variables such as effective strain, solution treatment, hot-forging temperature, and subsequent annealing. Microstructural evolutions were quantitatively characterized to interpret the kinetics of globularization based on the aforementioned variables. In particular, the combination of solution treatment, low-temperature (1073 K) forging, and subsequent annealing significantly accelerated the overall globularization. Such an accelerating effect stemmed from the reduced path for boundary splitting in fine α′ martensitic laths, which was induced via solution treatment. This accelerating effect disappeared at a high temperature (1223 K), which implies the necessity of optimizing the thermomechanical route to exploit martensitic laths.http://www.sciencedirect.com/science/article/pii/S2238785421002143Additive manufacturingTi-6Al-4VMartensiteDynamic globularizationStatic recrystallization |
| spellingShingle | In-Su Kim Jeong Mok Oh Sang Won Lee Jong-Taek Yeom Jae-Keun Hong Chan Hee Park Taekyung Lee Accelerating globularization in additively manufactured Ti-6Al-4V by exploiting martensitic laths Journal of Materials Research and Technology Additive manufacturing Ti-6Al-4V Martensite Dynamic globularization Static recrystallization |
| title | Accelerating globularization in additively manufactured Ti-6Al-4V by exploiting martensitic laths |
| title_full | Accelerating globularization in additively manufactured Ti-6Al-4V by exploiting martensitic laths |
| title_fullStr | Accelerating globularization in additively manufactured Ti-6Al-4V by exploiting martensitic laths |
| title_full_unstemmed | Accelerating globularization in additively manufactured Ti-6Al-4V by exploiting martensitic laths |
| title_short | Accelerating globularization in additively manufactured Ti-6Al-4V by exploiting martensitic laths |
| title_sort | accelerating globularization in additively manufactured ti 6al 4v by exploiting martensitic laths |
| topic | Additive manufacturing Ti-6Al-4V Martensite Dynamic globularization Static recrystallization |
| url | http://www.sciencedirect.com/science/article/pii/S2238785421002143 |
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