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Materials Research Letters Volume 10, 2022 - Issue 10
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Original Reports

The role of in-situ nano-TiB2 particles in improving the printability of noncastable 2024Al alloy

Tengteng Suna State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai, People’s Republic of China;b School of Materials Science & Engineering, Shanghai Jiao Tong University, Shanghai, People’s Republic of ChinaView further author information
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Hongze Wanga State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai, People’s Republic of China;b School of Materials Science & Engineering, Shanghai Jiao Tong University, Shanghai, People’s Republic of China;d Department of Mechanical Engineering, University College London, London, UK;e Research Complex at Harwell, Harwell Campus, Oxfordshire, UKCorrespondence[email protected] [email protected] [email protected]
View further author information
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Zhenyang Gaoa State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai, People’s Republic of China;b School of Materials Science & Engineering, Shanghai Jiao Tong University, Shanghai, People’s Republic of ChinaView further author information
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Yi Wua State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai, People’s Republic of China;b School of Materials Science & Engineering, Shanghai Jiao Tong University, Shanghai, People’s Republic of China;c Institute of Alumics Materials, Shanghai Jiao Tong University (Anhui), Huaibei, People’s Republic of ChinaView further author information
,
Mingliang Wanga State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai, People’s Republic of China;b School of Materials Science & Engineering, Shanghai Jiao Tong University, Shanghai, People’s Republic of ChinaView further author information
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Xinyuan Jina State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai, People’s Republic of China;b School of Materials Science & Engineering, Shanghai Jiao Tong University, Shanghai, People’s Republic of ChinaView further author information
,
Chu Lun Alex Leungd Department of Mechanical Engineering, University College London, London, UK;e Research Complex at Harwell, Harwell Campus, Oxfordshire, UKView further author information
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P.D. Leed Department of Mechanical Engineering, University College London, London, UK;e Research Complex at Harwell, Harwell Campus, Oxfordshire, UKView further author information
,
Yanan Fuf Shanghai Synchrotron Radiation Facility/Zhangjiang Lab, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, People’s Republic of ChinaView further author information
&
Haowei Wanga State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai, People’s Republic of China;b School of Materials Science & Engineering, Shanghai Jiao Tong University, Shanghai, People’s Republic of ChinaView further author information
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Pages 656-665 | Received 14 Mar 2022, Published online: 30 May 2022

Figures & data

Table 1. Chemical compositions and theoretical density (ρ) of the experimental material calculated by JMatPro.

Figure 1. X-ray CT results of porosity in as-printed (a) 2024Al alloy, (b-f) xTiB2/2024Al composites (x = 1, 2, 4, 6, 8 wt.%), (g) volume fraction of pores with average size divided by 1 μm, (h) relative density of as-printed samples and (i) reflectivity of the powders. The dashed vertical line indicates the laser wavelength at 1070 nm.

Figure 1. X-ray CT results of porosity in as-printed (a) 2024Al alloy, (b-f) xTiB2/2024Al composites (x = 1, 2, 4, 6, 8 wt.%), (g) volume fraction of pores with average size divided by 1 μm, (h) relative density of as-printed samples and (i) reflectivity of the powders. The dashed vertical line indicates the laser wavelength at 1070 nm.

Figure 2. EBSD maps for as-printed (a) 2024Al, (b-f) xTiB2/2024Al composites (x = 1, 2, 4, 6, 8 wt.%); the misorientation angle distribution of (g) 2024Al, (h-l) xTiB2/2024Al composites, corresponding {001} pole figures are placed in the images, (m) area fraction of HAGBs and LAGBs in as-printed samples.

Figure 2. EBSD maps for as-printed (a) 2024Al, (b-f) xTiB2/2024Al composites (x = 1, 2, 4, 6, 8 wt.%); the misorientation angle distribution of (g) 2024Al, (h-l) xTiB2/2024Al composites, corresponding {001} pole figures are placed in the images, (m) area fraction of HAGBs and LAGBs in as-printed samples.

Figure 3. (a) Average grain size of the as-printed samples, (b) area fraction of the columnar and equiaxed grain, (c) distinct columnar and equiaxed grain size, (d) plot of the grain size vs the inverse cube root of the TiB2 content for the present work.

Figure 3. (a) Average grain size of the as-printed samples, (b) area fraction of the columnar and equiaxed grain, (c) distinct columnar and equiaxed grain size, (d) plot of the grain size vs the inverse cube root of the TiB2 content for the present work.

Figure 4. (a) Average Vickers hardness values, (b) multiple strengthening increment of the HV, (c) tensile stress-strain curves, (d) comparison of strength and ductility of the as-printed samples, (e) mechanical properties comparison of the present as-printed samples with reference [37, 39, Citation41–49].

Figure 4. (a) Average Vickers hardness values, (b) multiple strengthening increment of the HV, (c) tensile stress-strain curves, (d) comparison of strength and ductility of the as-printed samples, (e) mechanical properties comparison of the present as-printed samples with reference [37, 39, Citation41–49].
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