Cargando…
Effects of the γ″-Ni(3)Nb Phase on Mechanical Properties of Inconel 718 Superalloys with Different Heat Treatments
The effects of the γ″-Ni(3)Nb phase on the mechanical properties of Inconel 718 superalloys, with standard heat treatment, hot isostatic pressing + solution treatment + aging, and hot isostatic pressing + direct aging, were characterized by morphological observation, X-ray diffraction, and tensile e...
Autores principales: | , , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2019
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6981741/ https://www.ncbi.nlm.nih.gov/pubmed/31906136 http://dx.doi.org/10.3390/ma13010151 |
_version_ | 1783491151923249152 |
---|---|
author | Ling, Li-Shi-Bao Yin, Zheng Hu, Zhi Liang, Jin-Hui Wang, Zhi-Yong Wang, Jun Sun, Bao-De |
author_facet | Ling, Li-Shi-Bao Yin, Zheng Hu, Zhi Liang, Jin-Hui Wang, Zhi-Yong Wang, Jun Sun, Bao-De |
author_sort | Ling, Li-Shi-Bao |
collection | PubMed |
description | The effects of the γ″-Ni(3)Nb phase on the mechanical properties of Inconel 718 superalloys, with standard heat treatment, hot isostatic pressing + solution treatment + aging, and hot isostatic pressing + direct aging, were characterized by morphological observation, X-ray diffraction, and tensile experiments. The results of the morphological observation revealed that many fine γ″ precipitates of ~26.49 ± 1.82 nm in mean size were formed in all samples. However, the relatively coarser γ″ precipitates formed in the grain boundaries were only observed in the sample treated with hot isostatic pressing + direct aging. The yield strengths of the hot isostatic pressing + direct aging sample at room temperature and at 650 °C both exhibited the maximum values about 993 ± 5.7 and 811 ± 12.6 MPa, respectively. The γ″ precipitate was considered to be the dominant strengthening phase in the sample according to the lattice misfits (ε) of γ/γ″. The strengthening mechanism of the samples can be explained as the coherency strain strengthening of fine γ″ precipitates. Moreover, due to the coarser γ″ precipitates in the grain boundaries, dislocation-cut ordered particle strengthening also occurred in the sample after hot isostatic pressing + direct aging treatment. |
format | Online Article Text |
id | pubmed-6981741 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-69817412020-02-07 Effects of the γ″-Ni(3)Nb Phase on Mechanical Properties of Inconel 718 Superalloys with Different Heat Treatments Ling, Li-Shi-Bao Yin, Zheng Hu, Zhi Liang, Jin-Hui Wang, Zhi-Yong Wang, Jun Sun, Bao-De Materials (Basel) Article The effects of the γ″-Ni(3)Nb phase on the mechanical properties of Inconel 718 superalloys, with standard heat treatment, hot isostatic pressing + solution treatment + aging, and hot isostatic pressing + direct aging, were characterized by morphological observation, X-ray diffraction, and tensile experiments. The results of the morphological observation revealed that many fine γ″ precipitates of ~26.49 ± 1.82 nm in mean size were formed in all samples. However, the relatively coarser γ″ precipitates formed in the grain boundaries were only observed in the sample treated with hot isostatic pressing + direct aging. The yield strengths of the hot isostatic pressing + direct aging sample at room temperature and at 650 °C both exhibited the maximum values about 993 ± 5.7 and 811 ± 12.6 MPa, respectively. The γ″ precipitate was considered to be the dominant strengthening phase in the sample according to the lattice misfits (ε) of γ/γ″. The strengthening mechanism of the samples can be explained as the coherency strain strengthening of fine γ″ precipitates. Moreover, due to the coarser γ″ precipitates in the grain boundaries, dislocation-cut ordered particle strengthening also occurred in the sample after hot isostatic pressing + direct aging treatment. MDPI 2019-12-31 /pmc/articles/PMC6981741/ /pubmed/31906136 http://dx.doi.org/10.3390/ma13010151 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Ling, Li-Shi-Bao Yin, Zheng Hu, Zhi Liang, Jin-Hui Wang, Zhi-Yong Wang, Jun Sun, Bao-De Effects of the γ″-Ni(3)Nb Phase on Mechanical Properties of Inconel 718 Superalloys with Different Heat Treatments |
title | Effects of the γ″-Ni(3)Nb Phase on Mechanical Properties of Inconel 718 Superalloys with Different Heat Treatments |
title_full | Effects of the γ″-Ni(3)Nb Phase on Mechanical Properties of Inconel 718 Superalloys with Different Heat Treatments |
title_fullStr | Effects of the γ″-Ni(3)Nb Phase on Mechanical Properties of Inconel 718 Superalloys with Different Heat Treatments |
title_full_unstemmed | Effects of the γ″-Ni(3)Nb Phase on Mechanical Properties of Inconel 718 Superalloys with Different Heat Treatments |
title_short | Effects of the γ″-Ni(3)Nb Phase on Mechanical Properties of Inconel 718 Superalloys with Different Heat Treatments |
title_sort | effects of the γ″-ni(3)nb phase on mechanical properties of inconel 718 superalloys with different heat treatments |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6981741/ https://www.ncbi.nlm.nih.gov/pubmed/31906136 http://dx.doi.org/10.3390/ma13010151 |
work_keys_str_mv | AT linglishibao effectsofthegni3nbphaseonmechanicalpropertiesofinconel718superalloyswithdifferentheattreatments AT yinzheng effectsofthegni3nbphaseonmechanicalpropertiesofinconel718superalloyswithdifferentheattreatments AT huzhi effectsofthegni3nbphaseonmechanicalpropertiesofinconel718superalloyswithdifferentheattreatments AT liangjinhui effectsofthegni3nbphaseonmechanicalpropertiesofinconel718superalloyswithdifferentheattreatments AT wangzhiyong effectsofthegni3nbphaseonmechanicalpropertiesofinconel718superalloyswithdifferentheattreatments AT wangjun effectsofthegni3nbphaseonmechanicalpropertiesofinconel718superalloyswithdifferentheattreatments AT sunbaode effectsofthegni3nbphaseonmechanicalpropertiesofinconel718superalloyswithdifferentheattreatments |