Tensile Deformation and Fracture Behavior of Nickel-Based Superalloy DZ951G

DZ951G is a novel developed nickel-based directional solidified superalloy with an incipient high melting point and low density. Compared with DZ417G superalloy, DZ951G superalloy has a higher ultimate tensile strength. At intermediate temperatures, the plasticity and strength were both markedly imp...

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Main Authors: Chenhao Guo, Jinjiang Yu, Jinlai Liu, Xiaofeng Sun, Yizhou Zhou
Format: Article
Language:English
Published: MDPI AG 2021-04-01
Series:Materials
Subjects:
Online Access:https://www.mdpi.com/1996-1944/14/9/2250
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author Chenhao Guo
Jinjiang Yu
Jinlai Liu
Xiaofeng Sun
Yizhou Zhou
author_facet Chenhao Guo
Jinjiang Yu
Jinlai Liu
Xiaofeng Sun
Yizhou Zhou
author_sort Chenhao Guo
collection DOAJ
description DZ951G is a novel developed nickel-based directional solidified superalloy with an incipient high melting point and low density. Compared with DZ417G superalloy, DZ951G superalloy has a higher ultimate tensile strength. At intermediate temperatures, the plasticity and strength were both markedly improved, and an obviously anomalous yield behavior could be observed where the yield strength reached its maximum at 760 °C. Below 600 °C, two competitive modes of dislocations shearing γ′ particles existed, in which one was the formation of stacking faults and another was a/2<101> dislocations shearing. At intermediate temperatures, a transitional phase between shearing γ′ particles and bypassing appeared, and the fracture translated from brittle fracture into ductile fracture. Exceeding 900 °C, bypassing of dislocations was operated under thermal activation. Moreover, short continuous stacking faults still existed at 760 °C. Finally, the various dislocation configurations were rationally illuminated and explained with the intrinsic connection of mechanical properties.
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spelling doaj.art-97583ec7eedf4880849acb493c826f572023-11-21T17:23:01ZengMDPI AGMaterials1996-19442021-04-01149225010.3390/ma14092250Tensile Deformation and Fracture Behavior of Nickel-Based Superalloy DZ951GChenhao Guo0Jinjiang Yu1Jinlai Liu2Xiaofeng Sun3Yizhou Zhou4Shi-Changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, ChinaShi-Changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, ChinaShi-Changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, ChinaShi-Changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, ChinaShi-Changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, ChinaDZ951G is a novel developed nickel-based directional solidified superalloy with an incipient high melting point and low density. Compared with DZ417G superalloy, DZ951G superalloy has a higher ultimate tensile strength. At intermediate temperatures, the plasticity and strength were both markedly improved, and an obviously anomalous yield behavior could be observed where the yield strength reached its maximum at 760 °C. Below 600 °C, two competitive modes of dislocations shearing γ′ particles existed, in which one was the formation of stacking faults and another was a/2<101> dislocations shearing. At intermediate temperatures, a transitional phase between shearing γ′ particles and bypassing appeared, and the fracture translated from brittle fracture into ductile fracture. Exceeding 900 °C, bypassing of dislocations was operated under thermal activation. Moreover, short continuous stacking faults still existed at 760 °C. Finally, the various dislocation configurations were rationally illuminated and explained with the intrinsic connection of mechanical properties.https://www.mdpi.com/1996-1944/14/9/2250DZ951G superalloytensile propertiesstacking faultsmicrostructuresdeformation mechanisms
spellingShingle Chenhao Guo
Jinjiang Yu
Jinlai Liu
Xiaofeng Sun
Yizhou Zhou
Tensile Deformation and Fracture Behavior of Nickel-Based Superalloy DZ951G
Materials
DZ951G superalloy
tensile properties
stacking faults
microstructures
deformation mechanisms
title Tensile Deformation and Fracture Behavior of Nickel-Based Superalloy DZ951G
title_full Tensile Deformation and Fracture Behavior of Nickel-Based Superalloy DZ951G
title_fullStr Tensile Deformation and Fracture Behavior of Nickel-Based Superalloy DZ951G
title_full_unstemmed Tensile Deformation and Fracture Behavior of Nickel-Based Superalloy DZ951G
title_short Tensile Deformation and Fracture Behavior of Nickel-Based Superalloy DZ951G
title_sort tensile deformation and fracture behavior of nickel based superalloy dz951g
topic DZ951G superalloy
tensile properties
stacking faults
microstructures
deformation mechanisms
url https://www.mdpi.com/1996-1944/14/9/2250
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AT jinjiangyu tensiledeformationandfracturebehaviorofnickelbasedsuperalloydz951g
AT jinlailiu tensiledeformationandfracturebehaviorofnickelbasedsuperalloydz951g
AT xiaofengsun tensiledeformationandfracturebehaviorofnickelbasedsuperalloydz951g
AT yizhouzhou tensiledeformationandfracturebehaviorofnickelbasedsuperalloydz951g