Experimental and Calphad Methods for Evaluating Residual Stresses and Solid-State Shrinkage after Solidification
Laser powder bed fusion is an additive manufacturing method that is based on melting and solidification of powder material. Due to the local heating above the melting point, thermal stresses are usually formed in the final part. Mitigation of residual stresses is usually assessed by laser scan strat...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-11-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/12/11/1894 |
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| author | Atte Antikainen Joni Reijonen Juha Lagerbom Matti Lindroos Tatu Pinomaa Tomi Lindroos |
| author_facet | Atte Antikainen Joni Reijonen Juha Lagerbom Matti Lindroos Tatu Pinomaa Tomi Lindroos |
| author_sort | Atte Antikainen |
| collection | DOAJ |
| description | Laser powder bed fusion is an additive manufacturing method that is based on melting and solidification of powder material. Due to the local heating above the melting point, thermal stresses are usually formed in the final part. Mitigation of residual stresses is usually assessed by laser scan strategies and not by alloy tailoring. In this paper a segregation-based residual stress formation mechanism is proposed and assessed computationally. Additionally, an experimental setup for rapid screening of residual stress formation in various alloys is proposed. The results should ease material development of metal alloys tailored for additive manufacturing by allowing the comparison of residual stress formation tendency (e.g., solid state shrinkage) between alloys. The proposed computational method is comparative in nature and forecasting absolute residual stress values would require known temperature dependent elastoplastic properties for the alloys as well as exact thermal history. The proposed experimental method is quantitative but its reliability depends on material properties such as yield strength. |
| first_indexed | 2024-03-09T18:50:45Z |
| format | Article |
| id | doaj.art-44baa535e650421282ec000f911f373b |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-09T18:50:45Z |
| publishDate | 2022-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-44baa535e650421282ec000f911f373b2023-11-24T05:52:50ZengMDPI AGMetals2075-47012022-11-011211189410.3390/met12111894Experimental and Calphad Methods for Evaluating Residual Stresses and Solid-State Shrinkage after SolidificationAtte Antikainen0Joni Reijonen1Juha Lagerbom2Matti Lindroos3Tatu Pinomaa4Tomi Lindroos5Additive and Smart Manufacturing Group, VTT Technical Research Centre of Finland, P.O. Box 1300, 33101 Tampere, FinlandAdditive and Smart Manufacturing Group, VTT Technical Research Centre of Finland, P.O. Box 1300, 33101 Tampere, FinlandAdditive and Smart Manufacturing Group, VTT Technical Research Centre of Finland, P.O. Box 1300, 33101 Tampere, FinlandAdditive and Smart Manufacturing Group, VTT Technical Research Centre of Finland, P.O. Box 1300, 33101 Tampere, FinlandAdditive and Smart Manufacturing Group, VTT Technical Research Centre of Finland, P.O. Box 1300, 33101 Tampere, FinlandAdditive and Smart Manufacturing Group, VTT Technical Research Centre of Finland, P.O. Box 1300, 33101 Tampere, FinlandLaser powder bed fusion is an additive manufacturing method that is based on melting and solidification of powder material. Due to the local heating above the melting point, thermal stresses are usually formed in the final part. Mitigation of residual stresses is usually assessed by laser scan strategies and not by alloy tailoring. In this paper a segregation-based residual stress formation mechanism is proposed and assessed computationally. Additionally, an experimental setup for rapid screening of residual stress formation in various alloys is proposed. The results should ease material development of metal alloys tailored for additive manufacturing by allowing the comparison of residual stress formation tendency (e.g., solid state shrinkage) between alloys. The proposed computational method is comparative in nature and forecasting absolute residual stress values would require known temperature dependent elastoplastic properties for the alloys as well as exact thermal history. The proposed experimental method is quantitative but its reliability depends on material properties such as yield strength.https://www.mdpi.com/2075-4701/12/11/1894additive manufacturingsegregationthermal expansionresidual stress |
| spellingShingle | Atte Antikainen Joni Reijonen Juha Lagerbom Matti Lindroos Tatu Pinomaa Tomi Lindroos Experimental and Calphad Methods for Evaluating Residual Stresses and Solid-State Shrinkage after Solidification Metals additive manufacturing segregation thermal expansion residual stress |
| title | Experimental and Calphad Methods for Evaluating Residual Stresses and Solid-State Shrinkage after Solidification |
| title_full | Experimental and Calphad Methods for Evaluating Residual Stresses and Solid-State Shrinkage after Solidification |
| title_fullStr | Experimental and Calphad Methods for Evaluating Residual Stresses and Solid-State Shrinkage after Solidification |
| title_full_unstemmed | Experimental and Calphad Methods for Evaluating Residual Stresses and Solid-State Shrinkage after Solidification |
| title_short | Experimental and Calphad Methods for Evaluating Residual Stresses and Solid-State Shrinkage after Solidification |
| title_sort | experimental and calphad methods for evaluating residual stresses and solid state shrinkage after solidification |
| topic | additive manufacturing segregation thermal expansion residual stress |
| url | https://www.mdpi.com/2075-4701/12/11/1894 |
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