Laser Powder Bed Fusion of GH3536 Alloy

Shiling Min; Juan Hou; Kai Zhang; Aijun Huang

doi:10.3788/LOP202158.1700008

Journals >Laser & Optoelectronics Progress >Volume 58 >Issue 17 >Page 1700008 > Article

Laser & Optoelectronics Progress
Vol. 58, Issue 17, 1700008 (2021)

Laser Powder Bed Fusion of GH3536 Alloy

Shiling Min¹, Juan Hou^1、*, Kai Zhang¹, and Aijun Huang²

Author Affiliations

¹Additive Manufacturing Research Institute, School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China

²Monash Center for Additive Manufacturing, Monash University, Notting Hill, VIC 3168, Australia

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DOI: 10.3788/LOP202158.1700008 Cite this Article Set citation alerts

Shiling Min, Juan Hou, Kai Zhang, Aijun Huang. Laser Powder Bed Fusion of GH3536 Alloy[J]. Laser & Optoelectronics Progress, 2021, 58(17): 1700008 Copy Citation Text

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Fig. 1. Schematic of laser powder bed fusion forming^[8]

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Fig. 2. TTT curve of GH3536 alloy drawn by Zhao et al^[29]

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Fig. 3. Typical metallographic structures of GH3536 alloy prepared by LPBF^[32]. (a) Metallographic structure in vertical direction; (b) metallographic structure in horizontal direction

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Fig. 4. 3D printed molten pool of GH3536 alloy at high magnification^[32].(a) In vertical direction; (b) in horizontal direction

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Fig. 5. Microstructures in different directions^[33]. (a) In vertical direction; (b) in horizontal direction

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Fig. 6. Microstructures in different directions after heat treatment^[32]. (a)In vertical direction; (b) in horizontal direction

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Fig. 7. Microstructures in different directions after hot isostatic pressing^[37]. (a) In vertical direction; (b) in horizontal direction

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Element	C	Cr	Co	W	Mo	Al	Ti	Ni
Mass fraction /%	0.05‒0.15	20.50‒23.00	0.50‒2.50	0.20‒1.00	8.00‒10.00	≤0.50	≤0.15	Bal.
Element	Fe	B	Mn	Si	P	S	Cu
Mass fraction /%	17.00‒20.00	≤0.010	≤1.00	≤1.00	≤0.025	≤0.015	≤0.50

Table 1. Chemical composition of GH3536 alloy

Species	Tensile properties at room temperature
Species	σ_0.2 /MPa	σ_b /MPa	δ_s /%
Cold rolled sheet	≥310	≥725	≥35
Cold rolled strip	≥310	≥760	≥30
Cold drawn pipe	≥310	≥690	≥25
Bar	≥275	≥690	≥30
Ring	≥275	≥690	≥30
Precision casting	≥200	≥380	≥10

Table 2. Mechanical properties of different varieties of GH3536 alloy stipulated in the technical standard^[26]

State	Direction	σ_0.2 /MPa	σ_b /MPa	δ_s /%
As-fabricated	Horizontal	630±20	780±5	8±3
As-fabricated	Vertical	600±40	900±5	28±4
LPBF+heat treatment	Horizontal	410±10	740±5	22±1
LPBF+heat treatment	Vertical	415±5	790±10	38±9
LPBF+HIP	Horizontal	480±40	760±5	40±1
LPBF+HIP	Vertical	430±30	810±5	41±10

Table 3. Room-temperature mechanical properties of GH3536 alloy prepared by LPBF^[44]

State	Direction	Yield strength /MPa	Tensile strength /MPa	Elongation /%	Reduction of area /%
Hot rolled		212	284	96	84
HIP+HT	Horizontal	214	312	54	48
HIP+HT	Vertical	224	333	57	41
HT	Horizontal	186	363	38	35
HT	Vertical	187	373	33	30
As-fabricated	Horizontal	370	471	19	23
As-fabricated	Vertical	299	358	3	4

Table 4. High-temperature mechanical properties of GH3536 alloy prepared by LPBF^[47]

Specimen	Stress /MPa	Breaking time /h	Steady creep rate /（%·h^-1）	Elongation /%	Shrinkage /%
Bar	125	27.2	0.463	57	64
	105	60.5	0.169	44	52
	85	219.5	0.0391	26	38
Sample 1	125	167	0.00364	5.0	12
	105	757	0.00117	4.7	11
	85	2580	0.000268	3.7	4.8
Sample 2	125	39	0.0270	6.7	10.5
	105	118	0.00738	6.0	7.8
	85	456	0.00158	-	-

Table 5. Creep properties of GH3536 alloy at high temperature^[49]

Shiling Min, Juan Hou, Kai Zhang, Aijun Huang. Laser Powder Bed Fusion of GH3536 Alloy[J]. Laser & Optoelectronics Progress, 2021, 58(17): 1700008

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