Scale effect on mechanical properties of titanium aluminide alloy additively manufactured by electron beam melting
TiAl (titanium aluminide) has been applied to turbine blades in aerospace industry, because it is a promising lightweight material with high strengths at high temperatures. In recent years, the production method of TiAl by additive manufacturing has been studied. In this research, the effect of dime...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | Japanese |
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The Japan Society of Mechanical Engineers
2021-08-01
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| Series: | Nihon Kikai Gakkai ronbunshu |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/transjsme/87/900/87_21-00146/_pdf/-char/en |
| _version_ | 1798018668018270208 |
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| author | Kazuhiro GOKAN Yudai YAMAGISI Kazuhiro MIZUTA Koji KAKEHI Masahiro ONOI |
| author_facet | Kazuhiro GOKAN Yudai YAMAGISI Kazuhiro MIZUTA Koji KAKEHI Masahiro ONOI |
| author_sort | Kazuhiro GOKAN |
| collection | DOAJ |
| description | TiAl (titanium aluminide) has been applied to turbine blades in aerospace industry, because it is a promising lightweight material with high strengths at high temperatures. In recent years, the production method of TiAl by additive manufacturing has been studied. In this research, the effect of dimensions of TiAl specimens by additive manufacturing had on the tensile and creep properties was studied. It was confirmed that the near-net specimen showed higher tensile strengths and lower creep resistance and life than those of the specimen cut from the block with larger cross section and volume than near net specimen. The results showed that the difference of the mechanical properties was because of the different microstructure caused by the powder melting process including hatching to melt inside the cross section and contouring perimeter. The difference in microstructure is considered to be due to the energy density. The energy density of contours is nearly 4 to 10 times higher than that of hatching. Therefore, it is considered that rapid heating and rapid cooling occur in the contour process, resulting in a fine structure. |
| first_indexed | 2024-04-11T16:28:11Z |
| format | Article |
| id | doaj.art-7cdc1001b8b14ca1a44a2bcfa10408af |
| institution | Directory Open Access Journal |
| issn | 2187-9761 |
| language | Japanese |
| last_indexed | 2024-04-11T16:28:11Z |
| publishDate | 2021-08-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Nihon Kikai Gakkai ronbunshu |
| spelling | doaj.art-7cdc1001b8b14ca1a44a2bcfa10408af2022-12-22T04:14:07ZjpnThe Japan Society of Mechanical EngineersNihon Kikai Gakkai ronbunshu2187-97612021-08-018790021-0014621-0014610.1299/transjsme.21-00146transjsmeScale effect on mechanical properties of titanium aluminide alloy additively manufactured by electron beam meltingKazuhiro GOKAN0Yudai YAMAGISI1Kazuhiro MIZUTA2Koji KAKEHI3Masahiro ONOI4Tokyo Metropolitan UniversityTokyo Metropolitan UniversityTokyo Metropolitan UniversityTokyo Metropolitan UniversityMetal Technology Co. Ltd.TiAl (titanium aluminide) has been applied to turbine blades in aerospace industry, because it is a promising lightweight material with high strengths at high temperatures. In recent years, the production method of TiAl by additive manufacturing has been studied. In this research, the effect of dimensions of TiAl specimens by additive manufacturing had on the tensile and creep properties was studied. It was confirmed that the near-net specimen showed higher tensile strengths and lower creep resistance and life than those of the specimen cut from the block with larger cross section and volume than near net specimen. The results showed that the difference of the mechanical properties was because of the different microstructure caused by the powder melting process including hatching to melt inside the cross section and contouring perimeter. The difference in microstructure is considered to be due to the energy density. The energy density of contours is nearly 4 to 10 times higher than that of hatching. Therefore, it is considered that rapid heating and rapid cooling occur in the contour process, resulting in a fine structure.https://www.jstage.jst.go.jp/article/transjsme/87/900/87_21-00146/_pdf/-char/enadditive manufacturingtial4822electron beam meltingtensile testcreep testmicrostructure |
| spellingShingle | Kazuhiro GOKAN Yudai YAMAGISI Kazuhiro MIZUTA Koji KAKEHI Masahiro ONOI Scale effect on mechanical properties of titanium aluminide alloy additively manufactured by electron beam melting Nihon Kikai Gakkai ronbunshu additive manufacturing tial4822 electron beam melting tensile test creep test microstructure |
| title | Scale effect on mechanical properties of titanium aluminide alloy additively manufactured by electron beam melting |
| title_full | Scale effect on mechanical properties of titanium aluminide alloy additively manufactured by electron beam melting |
| title_fullStr | Scale effect on mechanical properties of titanium aluminide alloy additively manufactured by electron beam melting |
| title_full_unstemmed | Scale effect on mechanical properties of titanium aluminide alloy additively manufactured by electron beam melting |
| title_short | Scale effect on mechanical properties of titanium aluminide alloy additively manufactured by electron beam melting |
| title_sort | scale effect on mechanical properties of titanium aluminide alloy additively manufactured by electron beam melting |
| topic | additive manufacturing tial4822 electron beam melting tensile test creep test microstructure |
| url | https://www.jstage.jst.go.jp/article/transjsme/87/900/87_21-00146/_pdf/-char/en |
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