A microstructural, mechanical and electrochemical/stress corrosion cracking investigation of a Cr-modified Ti–6Al–4V alloy
The microstructural effects of a Cr-modified Ti–6Al–4V (Ti64) alloy on the mechanical, electrochemical and stress corrosion cracking properties were studied. With the aid of thermodynamic calculations and microstructural characterizations, Ti64–3Cr forged alloy was successfully fabricated with no de...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-07-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785423011778 |
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| author | Stephen Yeboah Boakye Kyoungdoc Kim Jaekook Kim Jong-Sook Lee Jungmuk Choi Sam Yaw Anaman Hoon-Hwe Cho |
| author_facet | Stephen Yeboah Boakye Kyoungdoc Kim Jaekook Kim Jong-Sook Lee Jungmuk Choi Sam Yaw Anaman Hoon-Hwe Cho |
| author_sort | Stephen Yeboah Boakye |
| collection | DOAJ |
| description | The microstructural effects of a Cr-modified Ti–6Al–4V (Ti64) alloy on the mechanical, electrochemical and stress corrosion cracking properties were studied. With the aid of thermodynamic calculations and microstructural characterizations, Ti64–3Cr forged alloy was successfully fabricated with no defects by micro-alloying Ti64 with 3 wt% Cr. The microstructure features of the Ti64–3Cr alloy reveal fine alpha laths with a lamellar structure and strong texturing particularly in the basal and prismatic poles. The mechanical results at room temperature show enhanced yield strength and hardness attributed to the refined alpha laths and solid solution strengthening effect caused by Cr addition. Afterward, the electrochemical properties were investigated under different NaCl electrolyte concentrations. The alloy showed good corrosion resistance in the various NaCl concentrations as a result of the formation of Cr2O3 oxide due to the alloying effect of Ti64–3Cr alloy. X-ray photoelectron spectroscopy was used to confirm the presence of the oxides film on the surface of the alloy after the electrochemical studies. Furthermore, the stress corrosion cracking (SCC) properties of the alloy were investigated using a strain rate of 1 × 10−6 s−1 in 3.5 wt% NaCl aqueous solution under different temperatures. The results showed that as the temperature increased during slow strain rate testing, the SCC susceptibility of the alloy decreased. The outstanding SCC strength and enhanced corrosion properties of the novel alloy could serve as a potential use in marine applications. |
| first_indexed | 2024-03-12T15:21:08Z |
| format | Article |
| id | doaj.art-b8f59dba5da4400eb19b0f087884e72d |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-03-12T15:21:08Z |
| publishDate | 2023-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-b8f59dba5da4400eb19b0f087884e72d2023-08-11T05:32:53ZengElsevierJournal of Materials Research and Technology2238-78542023-07-0125354368A microstructural, mechanical and electrochemical/stress corrosion cracking investigation of a Cr-modified Ti–6Al–4V alloyStephen Yeboah Boakye0Kyoungdoc Kim1Jaekook Kim2Jong-Sook Lee3Jungmuk Choi4Sam Yaw Anaman5Hoon-Hwe Cho6Department of Materials Science and Engineering, Hanbat National University, 125 Dongseodae-ro, Yuseong-Gu, Daejeon, Republic of KoreaGraduate Institute of Ferrous and Energy Materials Technology, Pohang University of Science and Technology, Pohang, 37673, Republic of KoreaSchool of Materials Science and Engineering, Chonnam National University, Gwangju, 61186, Republic of KoreaSchool of Materials Science and Engineering, Chonnam National University, Gwangju, 61186, Republic of KoreaJinhap Technology Research Center, 40-57 Daehwa-dong Daedeok-gu, Daejeon, Republic of KoreaDepartment of Materials Science and Engineering, Hanbat National University, 125 Dongseodae-ro, Yuseong-Gu, Daejeon, Republic of Korea; Corresponding author.Department of Materials Science and Engineering, Hanbat National University, 125 Dongseodae-ro, Yuseong-Gu, Daejeon, Republic of Korea; Corresponding author.The microstructural effects of a Cr-modified Ti–6Al–4V (Ti64) alloy on the mechanical, electrochemical and stress corrosion cracking properties were studied. With the aid of thermodynamic calculations and microstructural characterizations, Ti64–3Cr forged alloy was successfully fabricated with no defects by micro-alloying Ti64 with 3 wt% Cr. The microstructure features of the Ti64–3Cr alloy reveal fine alpha laths with a lamellar structure and strong texturing particularly in the basal and prismatic poles. The mechanical results at room temperature show enhanced yield strength and hardness attributed to the refined alpha laths and solid solution strengthening effect caused by Cr addition. Afterward, the electrochemical properties were investigated under different NaCl electrolyte concentrations. The alloy showed good corrosion resistance in the various NaCl concentrations as a result of the formation of Cr2O3 oxide due to the alloying effect of Ti64–3Cr alloy. X-ray photoelectron spectroscopy was used to confirm the presence of the oxides film on the surface of the alloy after the electrochemical studies. Furthermore, the stress corrosion cracking (SCC) properties of the alloy were investigated using a strain rate of 1 × 10−6 s−1 in 3.5 wt% NaCl aqueous solution under different temperatures. The results showed that as the temperature increased during slow strain rate testing, the SCC susceptibility of the alloy decreased. The outstanding SCC strength and enhanced corrosion properties of the novel alloy could serve as a potential use in marine applications.http://www.sciencedirect.com/science/article/pii/S2238785423011778Titanium alloyMicrostructureCorrosion resistancePassivityStress corrosion cracking |
| spellingShingle | Stephen Yeboah Boakye Kyoungdoc Kim Jaekook Kim Jong-Sook Lee Jungmuk Choi Sam Yaw Anaman Hoon-Hwe Cho A microstructural, mechanical and electrochemical/stress corrosion cracking investigation of a Cr-modified Ti–6Al–4V alloy Journal of Materials Research and Technology Titanium alloy Microstructure Corrosion resistance Passivity Stress corrosion cracking |
| title | A microstructural, mechanical and electrochemical/stress corrosion cracking investigation of a Cr-modified Ti–6Al–4V alloy |
| title_full | A microstructural, mechanical and electrochemical/stress corrosion cracking investigation of a Cr-modified Ti–6Al–4V alloy |
| title_fullStr | A microstructural, mechanical and electrochemical/stress corrosion cracking investigation of a Cr-modified Ti–6Al–4V alloy |
| title_full_unstemmed | A microstructural, mechanical and electrochemical/stress corrosion cracking investigation of a Cr-modified Ti–6Al–4V alloy |
| title_short | A microstructural, mechanical and electrochemical/stress corrosion cracking investigation of a Cr-modified Ti–6Al–4V alloy |
| title_sort | microstructural mechanical and electrochemical stress corrosion cracking investigation of a cr modified ti 6al 4v alloy |
| topic | Titanium alloy Microstructure Corrosion resistance Passivity Stress corrosion cracking |
| url | http://www.sciencedirect.com/science/article/pii/S2238785423011778 |
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