Microstructure Evolution and Biodegradation Behavior of Laser Rapid Solidified Mg–Al–Zn Alloy
The too fast degradation of magnesium (Mg) alloys is a major impediment hindering their orthopedic application, despite their superior mechanical properties and favorable biocompatibility. In this study, the degradation resistance of AZ61 (Al 6 wt. %, Zn 1 wt. %, remaining Mg) was enhanced by rapid...
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MDPI AG
2017-03-01
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| Series: | Metals |
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| Online Access: | http://www.mdpi.com/2075-4701/7/3/105 |
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| author | Chongxian He Shizhen Bin Ping Wu Chengde Gao Pei Feng Youwen Yang Long Liu Yuanzhuo Zhou Mingchun Zhao Sheng Yang Cijun Shuai |
| author_facet | Chongxian He Shizhen Bin Ping Wu Chengde Gao Pei Feng Youwen Yang Long Liu Yuanzhuo Zhou Mingchun Zhao Sheng Yang Cijun Shuai |
| author_sort | Chongxian He |
| collection | DOAJ |
| description | The too fast degradation of magnesium (Mg) alloys is a major impediment hindering their orthopedic application, despite their superior mechanical properties and favorable biocompatibility. In this study, the degradation resistance of AZ61 (Al 6 wt. %, Zn 1 wt. %, remaining Mg) was enhanced by rapid solidification via selective laser melting (SLM). The results indicated that an increase of the laser power was beneficial for enhancing degradation resistance and microhardness due to the increase of relative density and formation of uniformed equiaxed grains. However, too high a laser power led to the increase of mass loss and decrease of microhardness due to coarsened equiaxed grains and a reduced solid solution of Al in the Mg matrix. In addition, immersion tests showed that the apatite increased with the increase of immersion time, which indicated that SLMed AZ61 possessed good bioactivity. |
| first_indexed | 2024-12-19T22:57:27Z |
| format | Article |
| id | doaj.art-f57a9288a8d649e3adba3691fcf8e100 |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-12-19T22:57:27Z |
| publishDate | 2017-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-f57a9288a8d649e3adba3691fcf8e1002022-12-21T20:02:37ZengMDPI AGMetals2075-47012017-03-017310510.3390/met7030105met7030105Microstructure Evolution and Biodegradation Behavior of Laser Rapid Solidified Mg–Al–Zn AlloyChongxian He0Shizhen Bin1Ping Wu2Chengde Gao3Pei Feng4Youwen Yang5Long Liu6Yuanzhuo Zhou7Mingchun Zhao8Sheng Yang9Cijun Shuai10State Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha 410083, ChinaDepartment of Oncology, Third Xiangya Hospital of Central South University, Changsha 410013, ChinaCollege of Chemistry, Xiangtan University, Xiangtan 411105, ChinaState Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha 410083, ChinaState Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha 410083, ChinaState Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha 410083, ChinaState Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha 410083, ChinaState Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha 410083, ChinaSchool of Material Science and Engineering, Central South University, Changsha 410083, ChinaHuman Reproduction Center, Shenzhen Hospital of Hongkong University, Shenzhen 518053, ChinaState Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha 410083, ChinaThe too fast degradation of magnesium (Mg) alloys is a major impediment hindering their orthopedic application, despite their superior mechanical properties and favorable biocompatibility. In this study, the degradation resistance of AZ61 (Al 6 wt. %, Zn 1 wt. %, remaining Mg) was enhanced by rapid solidification via selective laser melting (SLM). The results indicated that an increase of the laser power was beneficial for enhancing degradation resistance and microhardness due to the increase of relative density and formation of uniformed equiaxed grains. However, too high a laser power led to the increase of mass loss and decrease of microhardness due to coarsened equiaxed grains and a reduced solid solution of Al in the Mg matrix. In addition, immersion tests showed that the apatite increased with the increase of immersion time, which indicated that SLMed AZ61 possessed good bioactivity.http://www.mdpi.com/2075-4701/7/3/105AZ61selective laser meltingmicrostructurebiodegradation behavior |
| spellingShingle | Chongxian He Shizhen Bin Ping Wu Chengde Gao Pei Feng Youwen Yang Long Liu Yuanzhuo Zhou Mingchun Zhao Sheng Yang Cijun Shuai Microstructure Evolution and Biodegradation Behavior of Laser Rapid Solidified Mg–Al–Zn Alloy Metals AZ61 selective laser melting microstructure biodegradation behavior |
| title | Microstructure Evolution and Biodegradation Behavior of Laser Rapid Solidified Mg–Al–Zn Alloy |
| title_full | Microstructure Evolution and Biodegradation Behavior of Laser Rapid Solidified Mg–Al–Zn Alloy |
| title_fullStr | Microstructure Evolution and Biodegradation Behavior of Laser Rapid Solidified Mg–Al–Zn Alloy |
| title_full_unstemmed | Microstructure Evolution and Biodegradation Behavior of Laser Rapid Solidified Mg–Al–Zn Alloy |
| title_short | Microstructure Evolution and Biodegradation Behavior of Laser Rapid Solidified Mg–Al–Zn Alloy |
| title_sort | microstructure evolution and biodegradation behavior of laser rapid solidified mg al zn alloy |
| topic | AZ61 selective laser melting microstructure biodegradation behavior |
| url | http://www.mdpi.com/2075-4701/7/3/105 |
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