Tensile behavior and deformation mechanism of secondary generation single crystal superalloy DD6 at 1070 C

DOI

10.2991/ic3me-15.2015.435How to use a DOI?

Keywords

DD6; Single crystal superalloy; Tensile behavior; fractographs; Microstructures;

Abstract

The tensile behavior of secondary general single crystal superalloy DD6 with low Re was investigated at 1070 C. In this study, orientation of the specimens was selected along the [001] direction and the evolution of microstructure and dislocation configurations were analyzed by SEM and TEM in detail. The results reveal that the stress—strain curves exhibit a curved feature, and fracture mechanism shows dimple model. After the tensile deformation at 1070 C, the ' phase morphology of DD6 alloy was maintained cubical. Due to the dissolution of ' phase and tensile stress loaded at 1070 C, the matrix channel is broadened. Consequently, the main deformation mechanism is that dislocations slip in matrix channels, and overcome the ' phases through by-passing process.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Jian Yu
AU  - Jiarong Li
AU  - Shizhong Liu
AU  - Mei Han
AU  - Zhenxue Shi
PY  - 2015/08
DA  - 2015/08
TI  - Tensile behavior and deformation mechanism of secondary generation single crystal superalloy DD6 at 1070 C
BT  - Proceedings of the 3rd International Conference on Material, Mechanical and Manufacturing Engineering
PB  - Atlantis Press
SP  - 2261
EP  - 2266
SN  - 2352-5401
UR  - https://doi.org/10.2991/ic3me-15.2015.435
DO  - 10.2991/ic3me-15.2015.435
ID  - Yu2015/08
ER  -