Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 251-261 |
| Number of pages | 11 |
| Journal | Materials Science and Engineering: A |
| Volume | 703 |
| Early online date | 22 Jul 2017 |
| DOIs | |
| Publication status | Published - 4 Aug 2017 |
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Keywords
- Selective laser melting
- Laser powder bed fusion
- Stainless steel 316L
- Porosity
- Fatigue property
- Process window
Cite this
Fatigue and Fracture Behaviour of Laser Powder Bed Fusion Stainless Steel 316L: Influence of Processing Parameters. / Zhang, Meng; Sun, Chen-Nan; Zhang, Xiang; Goh, Phoi Chin; Wei, Jun; Hardacre, David; Li, Hua.
In: Materials Science and Engineering: A, Vol. 703, 04.08.2017, p. 251-261.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Fatigue and Fracture Behaviour of Laser Powder Bed Fusion Stainless Steel 316L: Influence of Processing Parameters
AU - Zhang, Meng
AU - Sun, Chen-Nan
AU - Zhang, Xiang
AU - Goh, Phoi Chin
AU - Wei, Jun
AU - Hardacre, David
AU - Li, Hua
PY - 2017/8/4
Y1 - 2017/8/4
N2 - The laser powder bed fusion (L-PBF) process involves a large number of processing parameters. Extending the intricate relationship between processing and structure to mechanical performance is essential for structural L-PBF materials. The high cycle fatigue properties of L-PBF parts are very sensitive to process-induced porosities which promote premature failure through the crack initiation mechanisms. Results from this work show that for stainless steel 316L, porosity does not impinge on the high cycle fatigue properties when processing is kept within a ±30% tolerance band. In this ‘optimum’ processing region, crack initiation takes place due to defects at the solidification microstructure level. Beyond the ‘optimum’ processing region, over-melting and under-melting can lead to porosity-driven cracking and inferior fatigue resistance. In addition, regardless of the processing condition, fatigue resistance was found to follow a direct linear relationship with ductility and tensile strength in the low and high stress fatigue regimes respectively.
AB - The laser powder bed fusion (L-PBF) process involves a large number of processing parameters. Extending the intricate relationship between processing and structure to mechanical performance is essential for structural L-PBF materials. The high cycle fatigue properties of L-PBF parts are very sensitive to process-induced porosities which promote premature failure through the crack initiation mechanisms. Results from this work show that for stainless steel 316L, porosity does not impinge on the high cycle fatigue properties when processing is kept within a ±30% tolerance band. In this ‘optimum’ processing region, crack initiation takes place due to defects at the solidification microstructure level. Beyond the ‘optimum’ processing region, over-melting and under-melting can lead to porosity-driven cracking and inferior fatigue resistance. In addition, regardless of the processing condition, fatigue resistance was found to follow a direct linear relationship with ductility and tensile strength in the low and high stress fatigue regimes respectively.
KW - Selective laser melting
KW - Laser powder bed fusion
KW - Stainless steel 316L
KW - Porosity
KW - Fatigue property
KW - Process window
U2 - 10.1016/j.msea.2017.07.071
DO - 10.1016/j.msea.2017.07.071
M3 - Article
VL - 703
SP - 251
EP - 261
JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
SN - 0921-5093
ER -