Influence of heat treatment on microstructure, mechanical and corrosion behavior of WE43 alloy fabricated by laser-beam powder bed fusion
Magnesium (Mg) alloys are considered to be a new generation of revolutionary medical metals. Laser-beam powder bed fusion (PBF-LB) is suitable for fabricating metal implants with personalized and complicated structures. However, the as-built part usually exhibits undesirable microstructure and unsat...
| Main Authors: | , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2023-01-01
|
| Series: | International Journal of Extreme Manufacturing |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/2631-7990/acfad5 |
| _version_ | 1797658909835526144 |
|---|---|
| author | Chenrong Ling Qiang Li Zhe Zhang Youwen Yang Wenhao Zhou Wenlong Chen Zhi Dong Chunrong Pan Cijun Shuai |
| author_facet | Chenrong Ling Qiang Li Zhe Zhang Youwen Yang Wenhao Zhou Wenlong Chen Zhi Dong Chunrong Pan Cijun Shuai |
| author_sort | Chenrong Ling |
| collection | DOAJ |
| description | Magnesium (Mg) alloys are considered to be a new generation of revolutionary medical metals. Laser-beam powder bed fusion (PBF-LB) is suitable for fabricating metal implants with personalized and complicated structures. However, the as-built part usually exhibits undesirable microstructure and unsatisfactory performance. In this work, WE43 parts were firstly fabricated by PBF-LB and then subjected to heat treatment. Although a high densification rate of 99.91% was achieved using suitable processes, the as-built parts exhibited anisotropic and layered microstructure with heterogeneously precipitated Nd-rich intermetallic. After heat treatment, fine and nano-scaled Mg _24 Y _5 particles were precipitated. Meanwhile, the α -Mg grains underwent recrystallization and turned coarsened slightly, which effectively weakened the texture intensity and reduced the anisotropy. As a consequence, the yield strength and ultimate tensile strength were significantly improved to (250.2 ± 3.5) MPa and (312 ± 3.7) MPa, respectively, while the elongation was still maintained at a high level of 15.2%. Furthermore, the homogenized microstructure reduced the tendency of localized corrosion and favored the development of uniform passivation film. Thus, the degradation rate of WE43 parts was decreased by an order of magnitude. Besides, in-vitro cell experiments proved their favorable biocompatibility. |
| first_indexed | 2024-03-11T18:06:13Z |
| format | Article |
| id | doaj.art-78ba5cc65c004016afca2ea65fc95d92 |
| institution | Directory Open Access Journal |
| issn | 2631-7990 |
| language | English |
| last_indexed | 2024-03-11T18:06:13Z |
| publishDate | 2023-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | International Journal of Extreme Manufacturing |
| spelling | doaj.art-78ba5cc65c004016afca2ea65fc95d922023-10-17T05:40:33ZengIOP PublishingInternational Journal of Extreme Manufacturing2631-79902023-01-016101500110.1088/2631-7990/acfad5Influence of heat treatment on microstructure, mechanical and corrosion behavior of WE43 alloy fabricated by laser-beam powder bed fusionChenrong Ling0Qiang Li1Zhe Zhang2Youwen Yang3https://orcid.org/0000-0003-1557-0252Wenhao Zhou4Wenlong Chen5Zhi Dong6Chunrong Pan7Cijun Shuai8https://orcid.org/0000-0002-2029-5112College of Mechanical and Electrical Engineering, Jiangxi University of Science and Technology , Ganzhou 341000, People’s Republic of ChinaSchool of Mechanical and Electronic Engineering, Suzhou University , Suzhou 234000, People’s Republic of ChinaCollege of Mechanical and Electrical Engineering, Jiangxi University of Science and Technology , Ganzhou 341000, People’s Republic of ChinaCollege of Mechanical and Electrical Engineering, Jiangxi University of Science and Technology , Ganzhou 341000, People’s Republic of ChinaShaanxi Key Laboratory of Biomedical Metal Materials, Northwest Institute for Non-ferrous Metal Research , Xi’an 710016, People’s Republic of ChinaDepartment of Orthopedics, First Affiliated Hospital of Gannan Medical College , Ganzhou 341000, People’s Republic of ChinaSchool of Mechanical and Automotive Engineering, South China university of technology , Guangzhou 510641, People’s Republic of ChinaCollege of Mechanical and Electrical Engineering, Jiangxi University of Science and Technology , Ganzhou 341000, People’s Republic of ChinaCollege of Mechanical and Electrical Engineering, Jiangxi University of Science and Technology , Ganzhou 341000, People’s Republic of China; State Key Laboratory of High-Performance Complex Manufacturing, Central South University , Changsha 410083, People’s Republic of China; Double Medical Technology Inc. , Xiamen 361026, People’s Republic of ChinaMagnesium (Mg) alloys are considered to be a new generation of revolutionary medical metals. Laser-beam powder bed fusion (PBF-LB) is suitable for fabricating metal implants with personalized and complicated structures. However, the as-built part usually exhibits undesirable microstructure and unsatisfactory performance. In this work, WE43 parts were firstly fabricated by PBF-LB and then subjected to heat treatment. Although a high densification rate of 99.91% was achieved using suitable processes, the as-built parts exhibited anisotropic and layered microstructure with heterogeneously precipitated Nd-rich intermetallic. After heat treatment, fine and nano-scaled Mg _24 Y _5 particles were precipitated. Meanwhile, the α -Mg grains underwent recrystallization and turned coarsened slightly, which effectively weakened the texture intensity and reduced the anisotropy. As a consequence, the yield strength and ultimate tensile strength were significantly improved to (250.2 ± 3.5) MPa and (312 ± 3.7) MPa, respectively, while the elongation was still maintained at a high level of 15.2%. Furthermore, the homogenized microstructure reduced the tendency of localized corrosion and favored the development of uniform passivation film. Thus, the degradation rate of WE43 parts was decreased by an order of magnitude. Besides, in-vitro cell experiments proved their favorable biocompatibility.https://doi.org/10.1088/2631-7990/acfad5laser-beam powder bed fusionWE43 alloysheat treatmentmechanical performancebiodegradation behavior |
| spellingShingle | Chenrong Ling Qiang Li Zhe Zhang Youwen Yang Wenhao Zhou Wenlong Chen Zhi Dong Chunrong Pan Cijun Shuai Influence of heat treatment on microstructure, mechanical and corrosion behavior of WE43 alloy fabricated by laser-beam powder bed fusion International Journal of Extreme Manufacturing laser-beam powder bed fusion WE43 alloys heat treatment mechanical performance biodegradation behavior |
| title | Influence of heat treatment on microstructure, mechanical and corrosion behavior of WE43 alloy fabricated by laser-beam powder bed fusion |
| title_full | Influence of heat treatment on microstructure, mechanical and corrosion behavior of WE43 alloy fabricated by laser-beam powder bed fusion |
| title_fullStr | Influence of heat treatment on microstructure, mechanical and corrosion behavior of WE43 alloy fabricated by laser-beam powder bed fusion |
| title_full_unstemmed | Influence of heat treatment on microstructure, mechanical and corrosion behavior of WE43 alloy fabricated by laser-beam powder bed fusion |
| title_short | Influence of heat treatment on microstructure, mechanical and corrosion behavior of WE43 alloy fabricated by laser-beam powder bed fusion |
| title_sort | influence of heat treatment on microstructure mechanical and corrosion behavior of we43 alloy fabricated by laser beam powder bed fusion |
| topic | laser-beam powder bed fusion WE43 alloys heat treatment mechanical performance biodegradation behavior |
| url | https://doi.org/10.1088/2631-7990/acfad5 |
| work_keys_str_mv | AT chenrongling influenceofheattreatmentonmicrostructuremechanicalandcorrosionbehaviorofwe43alloyfabricatedbylaserbeampowderbedfusion AT qiangli influenceofheattreatmentonmicrostructuremechanicalandcorrosionbehaviorofwe43alloyfabricatedbylaserbeampowderbedfusion AT zhezhang influenceofheattreatmentonmicrostructuremechanicalandcorrosionbehaviorofwe43alloyfabricatedbylaserbeampowderbedfusion AT youwenyang influenceofheattreatmentonmicrostructuremechanicalandcorrosionbehaviorofwe43alloyfabricatedbylaserbeampowderbedfusion AT wenhaozhou influenceofheattreatmentonmicrostructuremechanicalandcorrosionbehaviorofwe43alloyfabricatedbylaserbeampowderbedfusion AT wenlongchen influenceofheattreatmentonmicrostructuremechanicalandcorrosionbehaviorofwe43alloyfabricatedbylaserbeampowderbedfusion AT zhidong influenceofheattreatmentonmicrostructuremechanicalandcorrosionbehaviorofwe43alloyfabricatedbylaserbeampowderbedfusion AT chunrongpan influenceofheattreatmentonmicrostructuremechanicalandcorrosionbehaviorofwe43alloyfabricatedbylaserbeampowderbedfusion AT cijunshuai influenceofheattreatmentonmicrostructuremechanicalandcorrosionbehaviorofwe43alloyfabricatedbylaserbeampowderbedfusion |