Yuchao Bai, Di Wang, Chaojiang Li. Research on A131 EH36/AISI 1045 Bimetallic Material Fabricated by Laser Directed Energy Deposition[J]. Chinese Journal of Lasers, 2022, 49(14): 1402304
- Chinese Journal of Lasers
- Vol. 49, Issue 14, 1402304 (2022)
Fig. 1. SEM morphology of powder and bimetallic structure. (a) Powder morphology of A131 EH36 steel; (b) schematic of DED bimetallic part and size of tensile sample
Fig. 2. Microscopic morphologies of DED A131 EH36 steel. (a) Low-magnification optical image; (b)(f) SEM images of different regions
Fig. 3. Original microscopic morphologies of rolled AISI 1045 steel. (a) Low-magnification optical image; (b)(d) high-magnification SEM images
Fig. 4. Microscopic morphologies after heat treatment. (a)(c) DED A131 EH36 steel; (d)(f) rolled AISI 1045 steel
Fig. 5. Optical microscopic morphologies of A131 EH36/AISI 1045 bimetallic part. (a) Before heat treatment; (b) after heat treatment; (c) distribution and (d) morphology of pore at interface before heat treatment
Fig. 6. Interfacial microscopic morphologies of A131 EH36/AISI 1045 bimetallic part. (a) Interfacial morphology; (b)(f) microscopic morphologies corresponding to five positions in Fig. 6(a)
Fig. 7. Interfacial microscopic morphologies after heat treatment. (a)(b) Low-magnification optical images; (c)(d) high-magnification SEM images
Fig. 8. Microhardnesses of A131 EH36/AISI 1045 bimetallic structure by DED. (a) Vickers microhardness distributions along interface before and after heat treatment; (b) hardness and microstructure of DED A131 EH36; (c) hardness and microstructure of original AISI 1045
Fig. 9. Engineering stress-strain curves of single and bimetallic parts and fracture location images of bimetallic part. (a) (c) Before heat treatment; (b) (d) after heat treatment
Fig. 10. Tensile test results of single and bimetallic parts before and after heat treatment
Fig. 11. Tensile fracture morphologies of single and bimetallic parts before heat treatment. (a)(a1)(a2) A131 EH36; (b)(b1)(b2) bimetallic part; (c)(c1)(c2) AISI 1045
Fig. 12. Tensile fracture morphologies of single and bimetallic parts after heat treatment. (a)(a1)(a2) A131 EH36; (b)(b1)(b2) bimetallic part; (c)(c1)(c2) AISI 1045
Fig. 13. Ball-like defects and locations for element detection in A131 EH36. (a) Large-size ball-like particles; (b) small-size ball-like particles
Fig. 14. Changes of cutting force. (a) FX;(b) FZ
Fig. 15. Machined surface and groove morphologies from AISI 1045 steel to A131 EH36 steel. (a) Before heat treatment; (b) after heat treatment
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Table 1. Main chemical compositions of A131 EH36 and AISI 1045 steels(mass fraction，%)
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Table 2. Chemical compositions of ball-like defects in Fig. 13( mass fraction, %)
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