Tensile properties and microstructure of additively manufactured Grade 91 steel for nuclear applications

Date

2021-02-01

Author

Eftink, Benjamin P.
Vega, Daniel A.
El Atwani, Osman
Sprouster, David J.
Yoo, Yung Suk J.
Steckley, Todd E.
Aydoğan Güngör, Eda
Cady, Carl M.
Al-Sheikhly, Mohamad
Lienert, Thomas J.
Maloy, Stuart A.

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

111
views

0
downloads

© 2020 Elsevier B.V.Laser powder bed additively manufactured Grade 91 composition steel was investigated in comparison to wrought Grade 91 steel in terms of microstructure and mechanical properties. As-deposited additively manufactured Grade 91 steel had a microstructure of lower bainitic regions surrounded by martensite. This is significantly different from the typical tempered martensitic microstructure of conventionally produced Grade 91 steel. The as-deposited additively manufactured material had excellent tensile mechanical properties with greater strength than the wrought material at room temperature, 300 and 600°C showing excellent promise for nuclear applications. Retention of strength at 300 and 600°C for the as-deposited additively manufactured material was attributed to transitional carbides in the lower bainitic regions. The additively manufactured material was also investigated in the tempered as well as normalized and tempered conditions, each showing decreased strength at elevated temperature than the as-deposited material.

Subject Keywords

Nuclear and High Energy Physics, General Materials Science, Nuclear Energy and Engineering

URI

https://hdl.handle.net/11511/69925

Journal

Journal of Nuclear Materials

DOI

https://doi.org/10.1016/j.jnucmat.2020.152723

Collections

Department of Metallurgical and Materials Engineering, Article

Suggestions

OpenMETU
Core

Nanohardness measurements of heavy ion irradiated coarse- and nanocrystalline-grained tungsten at room and high temperature El-Atwani, O.; Weaver, J. S.; Esquivel, E.; Efe, Mert; Chancey, M. R.; Wang, Y. Q.; Maloy, S. A.; Mara, N. (Elsevier BV, 2018-10-01) Heavy ion irradiation was performed on coarse and nanocrystalline-grained tungsten (CGW and NGW, respectively) at room temperature (RT) and 1050 K from 0.25 to 4 dpa to simulate radiation damage for fusion energy applications. TEM and nanohardness measurements of irradiated samples were made to quantify the radiation tolerance of these two candidate materials. In this case, TEM is used to quantify the defect morphology at low dpa values and determine the barrier strength coefficients of the different defect...
Tensile behavior of post-installed chemical anchors embedded to low strength concrete YILMAZ, SALİH; Özen, Muhammet Ali; YARDIM, YAVUZ (Elsevier BV, 2013-10-01) In the scope of this paper, tensile capacities of post-installed chemical anchors embedded to 5.9 and 10.9 MPa concrete blocks are investigated. Pull-out tests are applied to 80 ductile steel bars (S420a). For the anchor diameters, 12, 16 and 20 mm are chosen. On the other hand, 10, 15 and 20 times the bar diameter are selected as free-edge distance and embedment depth for monotonic tensile loading tests. The results indicate that installation of anchors into low-strength concrete with sufficient embedment ...
In situ 3D monitoring of corrosion on carbon steel and ferritic stainless steel embedded in cement paste Itty, PierreAdrien; Serdar, Marijana; Akgül, Çağla; Parkinson, Dula; MacDowell, Alastair A; Bjegovic, Dubravka; Monteiro, Paulo JM (Elsevier BV, 2014-06-01) In a X-ray microcomputed tomography study, active corrosion was induced by galvanostatically corroding steel embedded in cement paste. The results give insight into corrosion product build up, crack formation, leaching of products into the cracks and voids, and differences in morphology of corrosion attack in the case of carbon steel or stainless steel reinforcement. Carbon steel was homogeneously etched away with a homogeneous layer of corrosion products forming at the steel/cement paste interface. For fer...
Mechanical and microstructural evaluations of hot formed titanium sheets by electrical resistance heating process Ozturk, Fahrettin; Ece, Remzi Ecmel; Polat, Naki; Koksal, Arif; Evis, Zafer; Polat, Aytekin (Elsevier BV, 2013-08-20) In this study, effect of temperature in the electrical resistance heating process on mechanical properties and microstructures of commercially pure titanium grade 2 (CP2) and Ti-6Al-4V (T64) alloy sheets was investigated. Sheets were successfully heated by the electric resistance heating process, and their mechanical properties and microstructures were evaluated. Ductilities of both materials were increased significantly after 400 degrees C. Results indicate that no significant change was observed in grain ...
TENSILE FATIGUE BEHAVIOR OF TIGHTLY WOVEN CARBON CARBON COMPOSITES OZTURK, A; MOORE, RE (Elsevier BV, 1992-01-01) The tensile fatigue behaviour of a tightly woven carbon/carbon composite was investigated as a function of stress level. Load-controlled fatigue tests were performed in tension-tension mode with a stress ratio, R, of 0.1 under ambient laboratory conditions. Results of composite behaviour are discussed in terms of the relationship of the stress/strain behaviour to the fatigue life of these composites as well as the effects of applied stress levels. It is shown that these composites exhibit good resistance to...

Citation Formats

B. P. Eftink et al., “Tensile properties and microstructure of additively manufactured Grade 91 steel for nuclear applications,” Journal of Nuclear Materials, pp. 0–0, 2021, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/69925.