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Chinese Journal of Lasers, Volume. 47, Issue 11, 1102003(2020)

Effect of Heat Treatment on Dynamic Mechanical Properties of AerMet100 Ultrahigh Strength Steel Fabricated by Laser Additive Manufacturing

Yu Mengxiao1,2, Li Jia1,2,3, Li Zhuo1,2,3、*, Ran Xianzhe1,2,3, Zhang Shuquan1,2,4, and Liu Dong1,2,4
Author Affiliations
  • 1School of Material Science and Engineering, Beihang University, Beijing 100191, China
  • 2National Engineering Laboratory of Additive Manufacturing for Large Metallic Components, Beihang University, Beijing 100191, China
  • 3Ningbo Innovation Research Institute, Beihang University, Ningbo, Zhejiang 315800, China
  • 4Beijing Yuding Additive Research Institute Co., Ltd., Beijing 100096, China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (12)
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    References (20)
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    Figures & Tables(12)
    Sketch of split Hopkinson pressure bar device

    Fig. 1. Sketch of split Hopkinson pressure bar device

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    Microstructures of deposited AerMet100 steel by laser additive manufacturing. (a) ×1000; (b) ×2000

    Fig. 2. Microstructures of deposited AerMet100 steel by laser additive manufacturing. (a) ×1000; (b) ×2000

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    Compressive stress-strain curves of as-deposited specimens. (a) Quasi static stress-strain curve; (b) dynamic stress-strain curves

    Fig. 3. Compressive stress-strain curves of as-deposited specimens. (a) Quasi static stress-strain curve; (b) dynamic stress-strain curves

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    Microstructures of as-deposited specimens. (a) Uncompression; (b) compression strain rate of 4100 s-1, ×1000; (c) compression strain rate of 4100 s-1, ×5000

    Fig. 4. Microstructures of as-deposited specimens. (a) Uncompression; (b) compression strain rate of 4100 s-1, ×1000; (c) compression strain rate of 4100 s-1, ×5000

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    Microstructures of HT-1 specimens. (a) Uncompression, ×2000; (b) uncompression, ×5000; (c) compression strain rate of 4000 s-1,×2000; (d) compression strain rate of 4000 s-1,×5000

    Fig. 5. Microstructures of HT-1 specimens. (a) Uncompression, ×2000; (b) uncompression, ×5000; (c) compression strain rate of 4000 s-1,×2000; (d) compression strain rate of 4000 s-1,×5000

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    Microstructures of HT-2 specimens. (a) Uncompression, ×2000; (b) uncompression, ×5000; (c) compression strain rate of 4200 s-1,×2000; (d) compression strain rate of 4200 s-1,×5000

    Fig. 6. Microstructures of HT-2 specimens. (a) Uncompression, ×2000; (b) uncompression, ×5000; (c) compression strain rate of 4200 s-1,×2000; (d) compression strain rate of 4200 s-1,×5000

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    Microstructures of HT-3 specimens. (a) Uncompression, ×2000; (b) uncompression, ×5000; (c) compression strain rate of 4200 s-1,×2000; (d) compression strain rate of 4200 s-1,×5000

    Fig. 7. Microstructures of HT-3 specimens. (a) Uncompression, ×2000; (b) uncompression, ×5000; (c) compression strain rate of 4200 s-1,×2000; (d) compression strain rate of 4200 s-1,×5000

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    Dynamic impact fracture performance of laser additive manufactured AerMet100 steel in different heat treatment states(strain rate is about 4000 s-1). (a) Stress-strain curves; (b) shock absorption energy

    Fig. 8. Dynamic impact fracture performance of laser additive manufactured AerMet100 steel in different heat treatment states(strain rate is about 4000 s-1). (a) Stress-strain curves; (b) shock absorption energy

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    Dynamic impact fracture morphology of as-deposited specimen. (a) Macro morphology; (b) elongate dimples in parabolic shape; (c) flat area

    Fig. 9. Dynamic impact fracture morphology of as-deposited specimen. (a) Macro morphology; (b) elongate dimples in parabolic shape; (c) flat area

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    Dynamic impact fracture morphology of heat-treated specimens. (a)(b) HT-2 specimen; (c)(d) HT-3 specimen

    Fig. 10. Dynamic impact fracture morphology of heat-treated specimens. (a)(b) HT-2 specimen; (c)(d) HT-3 specimen

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    • Table 1. Chemical composition of laser additive manufactured AerMet100 steel as-deposited plate

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      Table 1. Chemical composition of laser additive manufactured AerMet100 steel as-deposited plate

      ElementCCoNiCrMoSiMnFe
      Mass fraction /%0.2313.5011.263.001.250.022<0.005Bal.

    • Table 2. Heat treatment process of laser additive manufactured AerMet100 ultra-high strength steel

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      Table 2. Heat treatment process of laser additive manufactured AerMet100 ultra-high strength steel

      SampleHeat treatment process
      AD
      HT-1885 ℃×1 h, oil quenching+(-196 ℃)×2 h+482 ℃×5 h, air cooling
      HT-2885 ℃×1 h, oil quenching+(-73 ℃)×1 h+482 ℃×5 h, air cooling
      HT-3885 ℃×1 h, oil quenching+(-73 ℃)×1 h+494 ℃×5 h, air cooling
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    Yu Mengxiao, Li Jia, Li Zhuo, Ran Xianzhe, Zhang Shuquan, Liu Dong. Effect of Heat Treatment on Dynamic Mechanical Properties of AerMet100 Ultrahigh Strength Steel Fabricated by Laser Additive Manufacturing[J]. Chinese Journal of Lasers, 2020, 47(11): 1102003

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    Paper Information

    Category: laser manufacturing

    Received: Apr. 27, 2020

    Accepted: --

    Published Online: Nov. 5, 2020

    The Author Email: Zhuo Li (lizhuo@buaa.edu.cn)

    DOI:10.3788/CJL202047.1102003

    Topics

    laser devices and laser physics
    Lasers and Laser Optics
    Laser physics
    laser manufacturing
    Instrumentation, Measurement and Metrology