scholarly journals Post-heat treatment design for high-strength low-alloy steels processed by laser powder bed fusion

2020 ◽  
Vol 788 ◽  
pp. 139531 ◽  
Author(s):  
Soumya Sridar ◽  
Yunhao Zhao ◽  
Kun Li ◽  
Xin Wang ◽  
Wei Xiong
Keyword(s):  
Heat Treatment ◽  
High Strength ◽  
Low Alloy Steels ◽  
Powder Bed Fusion ◽  
Laser Powder Bed Fusion ◽  
Post Heat Treatment ◽  
Powder Bed ◽  
Alloy Steels ◽  
Treatment Design

scholarly journals Laser Powder Bed Fusion Processing of Fe-Mn-Al-Ni Shape Memory Alloy—On the Effect of Elevated Platform Temperatures

Metals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 185
Author(s):  
Felix Clemens Ewald ◽  
Florian Brenne ◽  
Tobias Gustmann ◽  
Malte Vollmer ◽  
Philipp Krooß ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Crack Formation ◽  
Microstructural Analysis ◽  
Tensile Load ◽  
Grain Structure ◽  
Powder Bed Fusion ◽  
Laser Powder Bed Fusion ◽  
Cyclic Heat Treatment ◽  
Powder Bed ◽  
Cyclic Heat

In order to overcome constraints related to crack formation during additive processing (laser powder bed fusion, L-BPF) of Fe-Mn-Al-Ni, the potential of high-temperature L-PBF processing was investigated in the present study. The effect of the process parameters on crack formation, grain structure, and phase distribution in the as-built condition, as well as in the course of cyclic heat treatment was examined by microstructural analysis. Optimized processing parameters were applied to fabricate cylindrical samples featuring a crack-free and columnar grained microstructure. In the course of cyclic heat treatment, abnormal grain growth (AGG) sets in, eventually promoting the evolution of a bamboo like microstructure. Testing under tensile load revealed a well-defined stress plateau and reversible strains of up to 4%.

High strength WE43 microlattice structures additively manufactured by laser powder bed fusion

Materialia ◽  
2021 ◽  
Vol 16 ◽  
pp. 101067
Author(s):  
Holden Hyer ◽  
Le Zhou ◽  
Qingyang Liu ◽  
Dazhong Wu ◽  
Shutao Song ◽  
...  
Keyword(s):  
High Strength ◽  
Powder Bed Fusion ◽  
Laser Powder Bed Fusion ◽  
Powder Bed
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