Influence of Hastelloy-X Powder Composition on Anisotropic Forming Performance of Selective Laser Melting

Fig. 3. Microstructures of Hastelloy-X alloys from batch A materials by selective laser melting. (a) Transverse structure at M =100; (b) transverse structure at M=500; (c) longitudinal structure at M=100; (d) longitudinal structure at M=500

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Fig. 4. Microstructures of Hastelloy-X alloys from batch B materials by selective laser melting. (a) Transverse structure at M =100; (b) transverse structure at M=500; (c) longitudinal structure at M=100; (d) longitudinal structure at M=500; (e) polishing state of longitudinal structure at M=100

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$SEM images of tensile fractures at room temperature of Hastelloy-X alloys by selective laser melting. (a) Transverse structure of batch A at M=16; (b) transverse structure of batch A at M=200; (c) longitudinal structure of batch A at M=19; (d) longitudinal structure of batch A at M=200; (e) transverse structure of batch B at M=19; (f) transverse structure of batch B at M=200; (g) longitudinal structure of batch B at M=17; (h) longitudinal structure of batch B at M=200$

Fig. 5. SEM images of tensile fractures at room temperature of Hastelloy-X alloys by selective laser melting. (a) Transverse structure of batch A at M=16; (b) transverse structure of batch A at M=200; (c) longitudinal structure of batch A at M=19; (d) longitudinal structure of batch A at M=200; (e) transverse structure of batch B at M=19; (f) transverse structure of batch B at M=200; (g) longitudinal structure of batch B at M=17; (h) longitudinal structure of batch B at M=200

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Table 1. Chemical compositions of two batches of Hastelloy-X alloy powders (mass fraction)%
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Table 1. Chemical compositions of two batches of Hastelloy-X alloy powders (mass fraction)%
Element C Cr Co Mo Fe Mn B Si
Batch A 0.081 21.56 1.57 9.11 18.51 0.016 0.003 0.071
Batch B 0.050 21.38 1.59 9.16 18.53 0.006 0.001 0.365
ASTM 0.05-0.15 20.50-23.00 0.50-2.50 8.00-10.00 17.00-20.00 ≤1.00 ≤0.010 ≤1.00

Table 2. Tensile properties at room temperature of forming samples from two batches of powders

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Table 2. Tensile properties at room temperature of forming samples from two batches of powders

Material	Direction	Average tensile strength /MPa	Average yield strength /MPa	Average ductility /%
Batch A	Horizontal	754	337	41
Batch A	Vertical	717	328	45
Batch B	Horizontal	766	438	28
Batch B	Vertical	677	411	47
ASTM	-	690	275	30

Table 3. Tensile properties at high temperature (815 ℃) of forming samples from two batches of powders
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Table 3. Tensile properties at high temperature (815 ℃) of forming samples from two batches of powders
Material Direction Average tensile strength /MPa Average yield strength /MPa Average ductility /%
Batch A Horizontal 322 199 23
Batch A Vertical 312 198 32
Batch B Horizontal 336 256 20
Batch B Vertical 314 246 66
ASTM - 240 - 12

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Jing Wei, Yali Li, Yanli He, Huipeng Hou, Liming Lei. Influence of Hastelloy-X Powder Composition on Anisotropic Forming Performance of Selective Laser Melting[J]. Chinese Journal of Lasers, 2018, 45(12): 1202011

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Paper Information

Category: laser manufacturing

Received: Jun. 22, 2018

Accepted: Aug. 24, 2018

Published Online: May. 9, 2019

The Author Email:

DOI:10.3788/CJL201845.1202011

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. Chemical compositions of two batches of Hastelloy-X alloy powders (mass fraction)%

Table 1. Chemical compositions of two batches of Hastelloy-X alloy powders (mass fraction)%

Table 2. Tensile properties at room temperature of forming samples from two batches of powders

Table 2. Tensile properties at room temperature of forming samples from two batches of powders

Table 3. Tensile properties at high temperature (815 ℃) of forming samples from two batches of powders

Table 3. Tensile properties at high temperature (815 ℃) of forming samples from two batches of powders