Lairong Xiao, Wei Tan, Liming Liu, Huan Wang, Zhenwu Peng, Xiaojun Zhao. Effect of Post Treatment on the Microstructure and Properties of the GH3536 Alloy Formed by Additive Manufacturing[J]. Laser & Optoelectronics Progress, 2021, 58(17): 1714010
- Laser & Optoelectronics Progress
- Vol. 58, Issue 17, 1714010 (2021)
Fig. 1. Schematic of scanning strategy of SLM forming
Fig. 2. Dimension diagrams of specimen.（a）Tensile specimen；（b）fatigue crack growth specimen
Fig. 3. Relative density of GH3536 alloy in different states
Fig. 4. Microstructures of as-deposited GH3536 alloy. (a) X‒Y plane; (b) (c) X‒Z plane; (d) amplified view of area 1
Fig. 5. Microstructures of SLM GH3536 alloy after post treatment. (a) X‒Y plane of HIP state; (b) X‒Z plane of HIP state; (c) X‒Y plane of HIP+ST state; (d) X‒Z plane of HIP+ST state
Fig. 6. BSE images and EDS analysis results of SLM GH3536 alloy in different treatment states.（a）Precipitation image of HIP state；（b）precipitation image of HIP+ST state；（c）EDS analysis result of spot 1；（d）EDS analysis result of spot 2；（e）EDS analysis result of spot 3
Fig. 7. Mechanical properties of SLM GH3536 in different states.（a）Tensile property at room temperature；（b）Vickers hardness
Fig. 8. Fatigue crack growth test results of SLM GH3536 in different states.（a）Crack length versus number of cycles；（b）fatigue crack growth rate curve
Fig. 9. Fatigue crack growth fractography of SLM GH3536 in different states.（a）Paris region of as-deposited alloy；（b）amplified view of area 1；（c）final rupture region of as-deposited alloy；（d）Paris region of HIP+ST alloy；（e）amplified view of area 2；（f）final rupture region of HIP+ST alloy
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Table 1. Chemical composition of GH3536 alloy powder
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Table 2. Chemical composition of some areas in Fig. 3（d）
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Table 3. Paris formula fitting results of SLM GH3536 alloy in different states
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