Effect of Hot Isostatic Pressing on Microstructures and Mechanical Properties of Ti6Al4V Fabricated by Electron Beam Melting
This study investigated the effects of hot isostatic pressing (HIP) on the microstructures and mechanical properties of Ti6Al4V fabricated by electron beam melting (EBM). The differences of surface morphologies, internal defects, relative density, microstructures, textures, mechanical properties and...
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| Format: | Article |
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MDPI AG
2020-04-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/10/5/593 |
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| author | Changyong Liu Zhuokeng Mai Deng Yan Mingguang Jiang Yuhong Dai Pei Wang Zhangwei Chen Changshi Lao |
| author_facet | Changyong Liu Zhuokeng Mai Deng Yan Mingguang Jiang Yuhong Dai Pei Wang Zhangwei Chen Changshi Lao |
| author_sort | Changyong Liu |
| collection | DOAJ |
| description | This study investigated the effects of hot isostatic pressing (HIP) on the microstructures and mechanical properties of Ti6Al4V fabricated by electron beam melting (EBM). The differences of surface morphologies, internal defects, relative density, microstructures, textures, mechanical properties and tensile fracture between the as-built and HIPed samples were observed using various characterization methods including optical metallography microscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM) and electron backscattered diffraction (EBSD) and tensile tests. It was found that the main effects of HIP on microstructures include—the increase of average grain size from 7.96 ± 1.21 μm to 11.34 ± 1.89 μm, the increase of α lamellar thickness from 0.71 ± 0.15 μm to 2.49 ± 1.29 μm and the increase of β phase ratio from 4.7% to 10.5% in terms of area fraction on the transversal section. The combinatorial effects including densification, increase of grain size, α lamellar thickness, β phase ratio, reduction of dislocation density and transformation of dislocation patterns contributed to the improvement of elongation and ductility of EBM-fabricated Ti6Al4V. Meanwhile, these effects also resulted in a slight reduction of the yield strength and UTS mainly due to the coarsening effect of HIP. |
| first_indexed | 2024-03-10T20:07:57Z |
| format | Article |
| id | doaj.art-e82ef8fb1cc54ac086132e164a9c1fb2 |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-10T20:07:57Z |
| publishDate | 2020-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-e82ef8fb1cc54ac086132e164a9c1fb22023-11-19T23:11:10ZengMDPI AGMetals2075-47012020-04-0110559310.3390/met10050593Effect of Hot Isostatic Pressing on Microstructures and Mechanical Properties of Ti6Al4V Fabricated by Electron Beam MeltingChangyong Liu0Zhuokeng Mai1Deng Yan2Mingguang Jiang3Yuhong Dai4Pei Wang5Zhangwei Chen6Changshi Lao7Additive Manufacturing Institue, College of Mechatronics and Control Engineering, Shenzhen University, Shenzhen 518060, ChinaAdditive Manufacturing Institue, College of Mechatronics and Control Engineering, Shenzhen University, Shenzhen 518060, ChinaAdditive Manufacturing Institue, College of Mechatronics and Control Engineering, Shenzhen University, Shenzhen 518060, ChinaAdditive Manufacturing Institue, College of Mechatronics and Control Engineering, Shenzhen University, Shenzhen 518060, ChinaShenzhen Sunshine Laser & Electronics Co., Ltd., Shenzhen 518057, ChinaAdditive Manufacturing Institue, College of Mechatronics and Control Engineering, Shenzhen University, Shenzhen 518060, ChinaAdditive Manufacturing Institue, College of Mechatronics and Control Engineering, Shenzhen University, Shenzhen 518060, ChinaAdditive Manufacturing Institue, College of Mechatronics and Control Engineering, Shenzhen University, Shenzhen 518060, ChinaThis study investigated the effects of hot isostatic pressing (HIP) on the microstructures and mechanical properties of Ti6Al4V fabricated by electron beam melting (EBM). The differences of surface morphologies, internal defects, relative density, microstructures, textures, mechanical properties and tensile fracture between the as-built and HIPed samples were observed using various characterization methods including optical metallography microscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM) and electron backscattered diffraction (EBSD) and tensile tests. It was found that the main effects of HIP on microstructures include—the increase of average grain size from 7.96 ± 1.21 μm to 11.34 ± 1.89 μm, the increase of α lamellar thickness from 0.71 ± 0.15 μm to 2.49 ± 1.29 μm and the increase of β phase ratio from 4.7% to 10.5% in terms of area fraction on the transversal section. The combinatorial effects including densification, increase of grain size, α lamellar thickness, β phase ratio, reduction of dislocation density and transformation of dislocation patterns contributed to the improvement of elongation and ductility of EBM-fabricated Ti6Al4V. Meanwhile, these effects also resulted in a slight reduction of the yield strength and UTS mainly due to the coarsening effect of HIP.https://www.mdpi.com/2075-4701/10/5/593electron beam meltingTi6Al4Vhot isostatic pressingmicrostructures |
| spellingShingle | Changyong Liu Zhuokeng Mai Deng Yan Mingguang Jiang Yuhong Dai Pei Wang Zhangwei Chen Changshi Lao Effect of Hot Isostatic Pressing on Microstructures and Mechanical Properties of Ti6Al4V Fabricated by Electron Beam Melting Metals electron beam melting Ti6Al4V hot isostatic pressing microstructures |
| title | Effect of Hot Isostatic Pressing on Microstructures and Mechanical Properties of Ti6Al4V Fabricated by Electron Beam Melting |
| title_full | Effect of Hot Isostatic Pressing on Microstructures and Mechanical Properties of Ti6Al4V Fabricated by Electron Beam Melting |
| title_fullStr | Effect of Hot Isostatic Pressing on Microstructures and Mechanical Properties of Ti6Al4V Fabricated by Electron Beam Melting |
| title_full_unstemmed | Effect of Hot Isostatic Pressing on Microstructures and Mechanical Properties of Ti6Al4V Fabricated by Electron Beam Melting |
| title_short | Effect of Hot Isostatic Pressing on Microstructures and Mechanical Properties of Ti6Al4V Fabricated by Electron Beam Melting |
| title_sort | effect of hot isostatic pressing on microstructures and mechanical properties of ti6al4v fabricated by electron beam melting |
| topic | electron beam melting Ti6Al4V hot isostatic pressing microstructures |
| url | https://www.mdpi.com/2075-4701/10/5/593 |
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