[{"publication":"Materials","type":"journal_article","status":"public","file":[{"success":1,"relation":"main_file","content_type":"application/pdf","file_size":2202343,"file_name":"2021_Heiland_MDPI Materials_Requirements for Processing High-Strength AlZnMgCu Alloys with PBF-LBM to Achieve Crack-Free and Dense Parts_print.pdf","file_id":"28018","access_level":"closed","date_updated":"2021-11-29T08:19:19Z","date_created":"2021-11-29T08:19:19Z","creator":"heilands"}],"abstract":[{"text":"Processing aluminum alloys employing powder bed fusion of metals (PBF-LB/M) is becoming more attractive for the industry, especially if lightweight applications are needed. Unfortunately, high-strength aluminum alloys such as AA7075 are prone to hot cracking during PBF-LB/M, as well as welding. Both a large solidification range promoted by the alloying elements zinc and copper and a high thermal gradient accompanied with the manufacturing process conditions lead to or favor hot cracking. In the present study, a simple method for modifying the powder surface with titanium carbide nanoparticles (NPs) as a nucleating agent is aimed. The effect on the microstructure with different amounts of the nucleating agent is shown. For the aluminum alloy 7075 with 2.5 ma% titanium carbide nanoparticles, manufactured via PBF-LB/M, crack-free samples with a refined microstructure having no discernible melt pool boundaries and columnar grains are observed. After using a two-step ageing heat treatment, ultimate tensile strengths up to 465 MPa and an 8.9% elongation at break are achieved. Furthermore, it is demonstrated that not all nanoparticles used remain in the melt pool during PBF-LB/M.","lang":"eng"}],"department":[{"_id":"9"},{"_id":"158"},{"_id":"219"}],"user_id":"77250","_id":"28017","file_date_updated":"2021-11-29T08:19:19Z","language":[{"iso":"eng"}],"keyword":["grain refinement","crack reduction","laser beam melting","aluminum alloy","titanium carbide","nanoparticle","PBF-LB/M"],"ddc":["620"],"has_accepted_license":"1","citation":{"short":"S. Heiland, B. Milkereit, K.-P. Hoyer, E. Zhuravlev, O. Keßler, M. Schaper, Materials (2021).","mla":"Heiland, Steffen, et al. “Requirements for Processing High-Strength AlZnMgCu Alloys with PBF-LB/M to Achieve Crack-Free and Dense Parts.” <i>Materials</i>, 2021, doi:<a href=\"https://doi.org/10.3390/ma14237190\">https://doi.org/10.3390/ma14237190</a>.","bibtex":"@article{Heiland_Milkereit_Hoyer_Zhuravlev_Keßler_Schaper_2021, title={Requirements for Processing High-Strength AlZnMgCu Alloys with PBF-LB/M to Achieve Crack-Free and Dense Parts}, DOI={<a href=\"https://doi.org/10.3390/ma14237190\">https://doi.org/10.3390/ma14237190</a>}, journal={Materials}, author={Heiland, Steffen and Milkereit, Benjamin and Hoyer, Kay-Peter and Zhuravlev, Evgeny and Keßler, Olaf and Schaper, Mirko}, year={2021} }","apa":"Heiland, S., Milkereit, B., Hoyer, K.-P., Zhuravlev, E., Keßler, O., &#38; Schaper, M. (2021). Requirements for Processing High-Strength AlZnMgCu Alloys with PBF-LB/M to Achieve Crack-Free and Dense Parts. <i>Materials</i>. <a href=\"https://doi.org/10.3390/ma14237190\">https://doi.org/10.3390/ma14237190</a>","ieee":"S. Heiland, B. Milkereit, K.-P. Hoyer, E. Zhuravlev, O. Keßler, and M. Schaper, “Requirements for Processing High-Strength AlZnMgCu Alloys with PBF-LB/M to Achieve Crack-Free and Dense Parts,” <i>Materials</i>, 2021, doi: <a href=\"https://doi.org/10.3390/ma14237190\">https://doi.org/10.3390/ma14237190</a>.","chicago":"Heiland, Steffen, Benjamin Milkereit, Kay-Peter Hoyer, Evgeny Zhuravlev, Olaf Keßler, and Mirko Schaper. “Requirements for Processing High-Strength AlZnMgCu Alloys with PBF-LB/M to Achieve Crack-Free and Dense Parts.” <i>Materials</i>, 2021. <a href=\"https://doi.org/10.3390/ma14237190\">https://doi.org/10.3390/ma14237190</a>.","ama":"Heiland S, Milkereit B, Hoyer K-P, Zhuravlev E, Keßler O, Schaper M. Requirements for Processing High-Strength AlZnMgCu Alloys with PBF-LB/M to Achieve Crack-Free and Dense Parts. <i>Materials</i>. Published online 2021. doi:<a href=\"https://doi.org/10.3390/ma14237190\">https://doi.org/10.3390/ma14237190</a>"},"year":"2021","date_created":"2021-11-29T08:23:43Z","author":[{"full_name":"Heiland, Steffen","id":"77250","last_name":"Heiland","first_name":"Steffen"},{"full_name":"Milkereit, Benjamin","last_name":"Milkereit","first_name":"Benjamin"},{"full_name":"Hoyer, Kay-Peter","last_name":"Hoyer","first_name":"Kay-Peter"},{"full_name":"Zhuravlev, Evgeny","last_name":"Zhuravlev","first_name":"Evgeny"},{"first_name":"Olaf","last_name":"Keßler","full_name":"Keßler, Olaf"},{"last_name":"Schaper","full_name":"Schaper, Mirko","first_name":"Mirko"}],"date_updated":"2022-01-06T06:57:50Z","doi":"https://doi.org/10.3390/ma14237190","main_file_link":[{"url":"https://www.mdpi.com/1996-1944/14/23/7190/htm"}],"title":"Requirements for Processing High-Strength AlZnMgCu Alloys with PBF-LB/M to Achieve Crack-Free and Dense Parts"}]