Developing a Ti6Al4V specimen to induce residual stress deformations and cracks for use in metal additive manufacturing online monitoring
In laser powder bed fusion factors such as residual stresses within the part, lead to deformations and cracks which impact the quality of the final product. Although residual stress and deformations have been thoroughly studied research and development of in-situ online monitoring requires a specime...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
EDP Sciences
2022-01-01
|
| Series: | MATEC Web of Conferences |
| Online Access: | https://www.matec-conferences.org/articles/matecconf/pdf/2022/17/matecconf_rapdasa2022_01004.pdf |
| _version_ | 1811301135369109504 |
|---|---|
| author | Moore Karabo Louw Danie Kouprianoff Dean |
| author_facet | Moore Karabo Louw Danie Kouprianoff Dean |
| author_sort | Moore Karabo |
| collection | DOAJ |
| description | In laser powder bed fusion factors such as residual stresses within the part, lead to deformations and cracks which impact the quality of the final product. Although residual stress and deformations have been thoroughly studied research and development of in-situ online monitoring requires a specimen that cracks in a predictable manner. This paper aims to show which sample geometry can be used to replicate cracks. The Ti6Al4V sample was designed based on known residual stress phenomena from literature of rapid heating and cooling cycles inducing compressive and tensile stresses during L-PBF. The sample was developed with the aid of computer aided design and simulation software using the inherent strain method. For the purpose of consistency, two identical samples were built simultaneously, and for the purpose of repeatability, two different builds were conducted. It was shown that the sample failed as predicted by the simulations due to the effective plastic strain and equivalent stress exceeding that of the mechanical properties. The sample developed can be used to test if cracks that form during the L-PBF build process can be predicted and detected. |
| first_indexed | 2024-04-13T07:03:31Z |
| format | Article |
| id | doaj.art-a3720c10bc234e1a9e73525b19ceeaa8 |
| institution | Directory Open Access Journal |
| issn | 2261-236X |
| language | English |
| last_indexed | 2024-04-13T07:03:31Z |
| publishDate | 2022-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | MATEC Web of Conferences |
| spelling | doaj.art-a3720c10bc234e1a9e73525b19ceeaa82022-12-22T02:57:04ZengEDP SciencesMATEC Web of Conferences2261-236X2022-01-013700100410.1051/matecconf/202237001004matecconf_rapdasa2022_01004Developing a Ti6Al4V specimen to induce residual stress deformations and cracks for use in metal additive manufacturing online monitoringMoore Karabo0Louw Danie1Kouprianoff Dean2Department of Mechanical and Mechatronic Engineering, Central University of TechnologyNational Laser Centre, Council for Scientific and Industrial ResearchDepartment of Mechanical and Mechatronic Engineering, Central University of TechnologyIn laser powder bed fusion factors such as residual stresses within the part, lead to deformations and cracks which impact the quality of the final product. Although residual stress and deformations have been thoroughly studied research and development of in-situ online monitoring requires a specimen that cracks in a predictable manner. This paper aims to show which sample geometry can be used to replicate cracks. The Ti6Al4V sample was designed based on known residual stress phenomena from literature of rapid heating and cooling cycles inducing compressive and tensile stresses during L-PBF. The sample was developed with the aid of computer aided design and simulation software using the inherent strain method. For the purpose of consistency, two identical samples were built simultaneously, and for the purpose of repeatability, two different builds were conducted. It was shown that the sample failed as predicted by the simulations due to the effective plastic strain and equivalent stress exceeding that of the mechanical properties. The sample developed can be used to test if cracks that form during the L-PBF build process can be predicted and detected.https://www.matec-conferences.org/articles/matecconf/pdf/2022/17/matecconf_rapdasa2022_01004.pdf |
| spellingShingle | Moore Karabo Louw Danie Kouprianoff Dean Developing a Ti6Al4V specimen to induce residual stress deformations and cracks for use in metal additive manufacturing online monitoring MATEC Web of Conferences |
| title | Developing a Ti6Al4V specimen to induce residual stress deformations and cracks for use in metal additive manufacturing online monitoring |
| title_full | Developing a Ti6Al4V specimen to induce residual stress deformations and cracks for use in metal additive manufacturing online monitoring |
| title_fullStr | Developing a Ti6Al4V specimen to induce residual stress deformations and cracks for use in metal additive manufacturing online monitoring |
| title_full_unstemmed | Developing a Ti6Al4V specimen to induce residual stress deformations and cracks for use in metal additive manufacturing online monitoring |
| title_short | Developing a Ti6Al4V specimen to induce residual stress deformations and cracks for use in metal additive manufacturing online monitoring |
| title_sort | developing a ti6al4v specimen to induce residual stress deformations and cracks for use in metal additive manufacturing online monitoring |
| url | https://www.matec-conferences.org/articles/matecconf/pdf/2022/17/matecconf_rapdasa2022_01004.pdf |
| work_keys_str_mv | AT moorekarabo developingati6al4vspecimentoinduceresidualstressdeformationsandcracksforuseinmetaladditivemanufacturingonlinemonitoring AT louwdanie developingati6al4vspecimentoinduceresidualstressdeformationsandcracksforuseinmetaladditivemanufacturingonlinemonitoring AT kouprianoffdean developingati6al4vspecimentoinduceresidualstressdeformationsandcracksforuseinmetaladditivemanufacturingonlinemonitoring |