About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
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Additive Manufacturing: Length-Scale Phenomena in Mechanical Response
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Presentation Title |
A-44: Correlation between Strengthening Mechanism and Dislocation Characteristics of Selective Laser Melted H13 Hot Work Tool Steel |
Author(s) |
Sung-Ho Kim, Yeonggeun Cho, Sung-Joon Kim |
On-Site Speaker (Planned) |
Sung-Ho Kim |
Abstract Scope |
Recently, additive manufacturing of H13 hot work tool steel has been spotlighted due to its high mechanical properties and tempering resistance while achieving lower tolerances compared to commercial grade H13. To find out the strengthening mechanism of the additively manufactured H13, the dislocation density was calculated using X-ray diffraction and EBSD, and the yield strength was calculated based on measured dislocation density. It was found that the calculated yield stress follows the experimentally measured values well, and confirmed that the high yield stress of the additively manufactured H13 was due to the high dislocation density compared to commercial grade H13. Furthermore, hardness-based indentation size effect (ISE) was analyzed to quantify the dislocation component of additively manufactured and commercial grade H13. As the indentation depth decreased, the GND density increased in additively manufactured H13. This is due to the GND at the cell boundary formed during solidification. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Iron and Steel, Mechanical Properties |