Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 804, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2021.140733
Keywords
Alloy design; Laser powder bed fusion; Ni-based sueralloy; Cracking inhibition
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Funding
- National Natural Science Foundation of China [91860131]
- Shenzhen Science and Technology Innovation Commission [JCYJ20170817111811303, KQTD20170328154443162, ZDSYS201703031748354]
- Pico Center at SUSTech CRF
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The study demonstrates that the addition of Hf can effectively inhibit cracking in the hard-to-weld superalloy IN738LC manufactured by the SLM process, leading to improved mechanical properties and increased relative density.
The effects of Hf addition on defects and mechanical properties of the hard-to-weld superalloy IN738LC manufactured by Selective Laser Melting (SLM) process were studied. The addition of Hf inhibits cracking in SLMed IN738LC. Cracking free and low porosity IN738LC parts were obtained in a wide range of process parameters. The study shows that the cracks were refilled by Hf-riched melt and the relative density was increased, thus the tensile properties at 700 and 850 degrees C were improved.
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