Evaluation of Forged TiAl Alloy Usefulness Based on Their Impact Resistance
The purpose of this study is to determine if forged TiAl alloys are worth using for small parts such as jet engine turbine blades. As part of this goal, this study investigated ways to improve the impact resistance of forged TiAl alloys and compared them to cast TiAl alloys. The effects of additive...
| প্রধান লেখক: | |
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| বিন্যাস: | প্রবন্ধ |
| ভাষা: | English |
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MDPI AG
2023-12-01
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| মালা: | Metals |
| বিষয়গুলি: | |
| অনলাইন ব্যবহার করুন: | https://www.mdpi.com/2075-4701/13/12/1991 |
| _version_ | 1827574162936299520 |
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| author | Toshimitsu Tetsui |
| author_facet | Toshimitsu Tetsui |
| author_sort | Toshimitsu Tetsui |
| collection | DOAJ |
| description | The purpose of this study is to determine if forged TiAl alloys are worth using for small parts such as jet engine turbine blades. As part of this goal, this study investigated ways to improve the impact resistance of forged TiAl alloys and compared them to cast TiAl alloys. The effects of additive elements and microstructure on the impact resistance of forged ternary TiAl alloys of 43.5 at. % Al were evaluated using the Charpy impact test on specimens heated to 500 °C prior to testing. The impact resistance of the forged alloys improved with the addition of Cr, V, and Mn and deteriorated with the addition of Nb. The impact resistance of the microstructure containing a β-phase, a common microstructure in forged TiAl alloys, was significantly lower. The fully lamellar structure obtained at the expense of forgeability showed much higher impact resistance than this. However, even the best impact resistance of the forged alloys was significantly inferior to that of cast ternary alloys of 46.5 at. % Al prepared with the same additive content. Combined with the high cost and low high-temperature strength of the forged TiAl alloys, it is concluded that it is pointless to use forged TiAl alloys for small parts that can be made via casting. |
| first_indexed | 2024-03-08T20:32:21Z |
| format | Article |
| id | doaj.art-d662e4b035534255b4734671604b7408 |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-08T20:32:21Z |
| publishDate | 2023-12-01 |
| publisher | MDPI AG |
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| series | Metals |
| spelling | doaj.art-d662e4b035534255b4734671604b74082023-12-22T14:24:46ZengMDPI AGMetals2075-47012023-12-011312199110.3390/met13121991Evaluation of Forged TiAl Alloy Usefulness Based on Their Impact ResistanceToshimitsu Tetsui0National Institute for Material Science, Tsukuba 305-0047, JapanThe purpose of this study is to determine if forged TiAl alloys are worth using for small parts such as jet engine turbine blades. As part of this goal, this study investigated ways to improve the impact resistance of forged TiAl alloys and compared them to cast TiAl alloys. The effects of additive elements and microstructure on the impact resistance of forged ternary TiAl alloys of 43.5 at. % Al were evaluated using the Charpy impact test on specimens heated to 500 °C prior to testing. The impact resistance of the forged alloys improved with the addition of Cr, V, and Mn and deteriorated with the addition of Nb. The impact resistance of the microstructure containing a β-phase, a common microstructure in forged TiAl alloys, was significantly lower. The fully lamellar structure obtained at the expense of forgeability showed much higher impact resistance than this. However, even the best impact resistance of the forged alloys was significantly inferior to that of cast ternary alloys of 46.5 at. % Al prepared with the same additive content. Combined with the high cost and low high-temperature strength of the forged TiAl alloys, it is concluded that it is pointless to use forged TiAl alloys for small parts that can be made via casting.https://www.mdpi.com/2075-4701/13/12/1991titanium aluminidesimpact resistancejet enginesturbine bladesforgingcasting |
| spellingShingle | Toshimitsu Tetsui Evaluation of Forged TiAl Alloy Usefulness Based on Their Impact Resistance Metals titanium aluminides impact resistance jet engines turbine blades forging casting |
| title | Evaluation of Forged TiAl Alloy Usefulness Based on Their Impact Resistance |
| title_full | Evaluation of Forged TiAl Alloy Usefulness Based on Their Impact Resistance |
| title_fullStr | Evaluation of Forged TiAl Alloy Usefulness Based on Their Impact Resistance |
| title_full_unstemmed | Evaluation of Forged TiAl Alloy Usefulness Based on Their Impact Resistance |
| title_short | Evaluation of Forged TiAl Alloy Usefulness Based on Their Impact Resistance |
| title_sort | evaluation of forged tial alloy usefulness based on their impact resistance |
| topic | titanium aluminides impact resistance jet engines turbine blades forging casting |
| url | https://www.mdpi.com/2075-4701/13/12/1991 |
| work_keys_str_mv | AT toshimitsutetsui evaluationofforgedtialalloyusefulnessbasedontheirimpactresistance |