Omer Cakmak , Seong Gyu Chung , Seung-Hoon Lee , JiHoe Koo , Hwasung Yeom , Jung-Wook Cho
{"title":"工艺气氛对激光粉末床熔融 Fe-12Cr-6Al 的微观结构、熔池、纹理、析出物特征和力学性能的影响","authors":"Omer Cakmak , Seong Gyu Chung , Seung-Hoon Lee , JiHoe Koo , Hwasung Yeom , Jung-Wook Cho","doi":"10.1016/j.addlet.2024.100219","DOIUrl":null,"url":null,"abstract":"<div><p>This study investigates the impact of atmospheres (Ar and N<sub>2</sub>) on Fe-12Cr-6Al alloy fabricated using laser powder bed fusion (L-PBF) in terms of melt pool shape/size, microstructure, precipitate characteristics, and mechanical properties. The sample built in the N<sub>2</sub> atmosphere exhibited lower porosity, wider melt pools, and no Al<sub>2</sub>O<sub>3</sub> agglomeration. Oxygen content decreased from 0.012 to 0.0045 (wt.%), and nitrogen content increased from 0.013 to 0.02 (wt.%). The Ar-printed sample had a yield strength (YS) of 232 ± 15 MPa, ultimate tensile strength (UTS) of 286 ± 10 MPa, and total elongation (TE) of 6.4 ± 1.3 %, while the N<sub>2</sub>-printed sample showed significant improvements of the mechanical properties: YS of 315 ± 11 MPa, UTS of 401 ± 11 MPa, and TE of 7.8 ± 1.1 %. Therefore, N<sub>2</sub> might be considered to replace Ar as a cost-effective shielding gas for FeCrAl alloys, with improved properties.</p></div>","PeriodicalId":72068,"journal":{"name":"Additive manufacturing letters","volume":null,"pages":null},"PeriodicalIF":4.2000,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772369024000288/pdfft?md5=ba051126cb68daecf2d4b3acf0654ffb&pid=1-s2.0-S2772369024000288-main.pdf","citationCount":"0","resultStr":"{\"title\":\"Effect of process atmosphere on microstructure, melt pool, texture, precipitate characteristics, and mechanical properties of laser powder bed fusion Fe-12Cr-6Al\",\"authors\":\"Omer Cakmak , Seong Gyu Chung , Seung-Hoon Lee , JiHoe Koo , Hwasung Yeom , Jung-Wook Cho\",\"doi\":\"10.1016/j.addlet.2024.100219\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>This study investigates the impact of atmospheres (Ar and N<sub>2</sub>) on Fe-12Cr-6Al alloy fabricated using laser powder bed fusion (L-PBF) in terms of melt pool shape/size, microstructure, precipitate characteristics, and mechanical properties. The sample built in the N<sub>2</sub> atmosphere exhibited lower porosity, wider melt pools, and no Al<sub>2</sub>O<sub>3</sub> agglomeration. Oxygen content decreased from 0.012 to 0.0045 (wt.%), and nitrogen content increased from 0.013 to 0.02 (wt.%). The Ar-printed sample had a yield strength (YS) of 232 ± 15 MPa, ultimate tensile strength (UTS) of 286 ± 10 MPa, and total elongation (TE) of 6.4 ± 1.3 %, while the N<sub>2</sub>-printed sample showed significant improvements of the mechanical properties: YS of 315 ± 11 MPa, UTS of 401 ± 11 MPa, and TE of 7.8 ± 1.1 %. Therefore, N<sub>2</sub> might be considered to replace Ar as a cost-effective shielding gas for FeCrAl alloys, with improved properties.</p></div>\",\"PeriodicalId\":72068,\"journal\":{\"name\":\"Additive manufacturing letters\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":4.2000,\"publicationDate\":\"2024-05-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.sciencedirect.com/science/article/pii/S2772369024000288/pdfft?md5=ba051126cb68daecf2d4b3acf0654ffb&pid=1-s2.0-S2772369024000288-main.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Additive manufacturing letters\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2772369024000288\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"ENGINEERING, MANUFACTURING\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Additive manufacturing letters","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2772369024000288","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, MANUFACTURING","Score":null,"Total":0}
Effect of process atmosphere on microstructure, melt pool, texture, precipitate characteristics, and mechanical properties of laser powder bed fusion Fe-12Cr-6Al
This study investigates the impact of atmospheres (Ar and N2) on Fe-12Cr-6Al alloy fabricated using laser powder bed fusion (L-PBF) in terms of melt pool shape/size, microstructure, precipitate characteristics, and mechanical properties. The sample built in the N2 atmosphere exhibited lower porosity, wider melt pools, and no Al2O3 agglomeration. Oxygen content decreased from 0.012 to 0.0045 (wt.%), and nitrogen content increased from 0.013 to 0.02 (wt.%). The Ar-printed sample had a yield strength (YS) of 232 ± 15 MPa, ultimate tensile strength (UTS) of 286 ± 10 MPa, and total elongation (TE) of 6.4 ± 1.3 %, while the N2-printed sample showed significant improvements of the mechanical properties: YS of 315 ± 11 MPa, UTS of 401 ± 11 MPa, and TE of 7.8 ± 1.1 %. Therefore, N2 might be considered to replace Ar as a cost-effective shielding gas for FeCrAl alloys, with improved properties.
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