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Thermal Fatigue Properties of H13 Hot-Work Tool Steels Processed by Selective Laser Melting
- Source :
- Metals, Volume 10, Issue 1, Metals, Vol 10, Iss 1, p 116 (2020)
- Publication Year :
- 2020
- Publisher :
- Multidisciplinary Digital Publishing Institute, 2020.
-
Abstract
- Currently, selective laser melting (SLM) is gaining widespread popularity as an alternative manufacturing technique for complex and customized parts, especially for hot-work and injection molding applications. In the present study, as the major factors for the failure of H13 hot-work die steels during hot-working, thermal fatigue (TF) properties of H13 processed by SLM and a conventional technique were investigated. TF tests (650 &deg<br />C/30 &deg<br />C) were conducted on the as-selective laser melted (As-SLMed), thermally treated selective laser melted (T-SLMed), and forged (Forged) H13. Results show that the As-SLMed H13 exhibited the best TF resistance properties among the specimens herein (the shortest total crack length and highest hardness of 687 &plusmn<br />12 HV5), whereas the Forged H13 exhibited the poorest TF resistance properties (the longest total crack length and lowest hardness of 590 &plusmn<br />11 HV5) after TF tests. TF resistance properties were closely related to the initial and final hardness. Further microstructural investigations revealed that the typical cell-like substructures, increased amount of retained austenite, and most importantly, refined grain size were the main reasons for the improved TF resistance properties in the As-SLMed H13 compared to the Forged counterparts.
- Subjects :
- lcsh:TN1-997
business.product_category
Materials science
thermal fatigue
microstructure
02 engineering and technology
Molding (process)
engineering.material
01 natural sciences
tool steel
0103 physical sciences
General Materials Science
Selective laser melting
Composite material
lcsh:Mining engineering. Metallurgy
010302 applied physics
Austenite
Metals and Alloys
Hot work
021001 nanoscience & nanotechnology
Microstructure
Grain size
hardness
Tool steel
engineering
Die (manufacturing)
0210 nano-technology
business
selective laser melting (SLM)
Subjects
Details
- Language :
- English
- ISSN :
- 20754701
- Database :
- OpenAIRE
- Journal :
- Metals
- Accession number :
- edsair.doi.dedup.....a961038899b93c14d0b0f7360ad06706
- Full Text :
- https://doi.org/10.3390/met10010116