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Title: Diffraction and single-crystal elastic constants of Inconel 625 at room and elevated temperatures determined by neutron diffraction

Authors:
; ; ;
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1359588
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing
Additional Journal Information:
Journal Volume: 674; Journal Issue: C; Related Information: CHORUS Timestamp: 2017-10-07 03:59:10; Journal ID: ISSN 0921-5093
Publisher:
Elsevier
Country of Publication:
Netherlands
Language:
English

Citation Formats

Wang, Zhuqing, Stoica, Alexandru D., Ma, Dong, and Beese, Allison M. Diffraction and single-crystal elastic constants of Inconel 625 at room and elevated temperatures determined by neutron diffraction. Netherlands: N. p., 2016. Web. doi:10.1016/j.msea.2016.08.010.
Wang, Zhuqing, Stoica, Alexandru D., Ma, Dong, & Beese, Allison M. Diffraction and single-crystal elastic constants of Inconel 625 at room and elevated temperatures determined by neutron diffraction. Netherlands. doi:10.1016/j.msea.2016.08.010.
Wang, Zhuqing, Stoica, Alexandru D., Ma, Dong, and Beese, Allison M. 2016. "Diffraction and single-crystal elastic constants of Inconel 625 at room and elevated temperatures determined by neutron diffraction". Netherlands. doi:10.1016/j.msea.2016.08.010.
@article{osti_1359588,
title = {Diffraction and single-crystal elastic constants of Inconel 625 at room and elevated temperatures determined by neutron diffraction},
author = {Wang, Zhuqing and Stoica, Alexandru D. and Ma, Dong and Beese, Allison M.},
abstractNote = {},
doi = {10.1016/j.msea.2016.08.010},
journal = {Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing},
number = C,
volume = 674,
place = {Netherlands},
year = 2016,
month = 9
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1016/j.msea.2016.08.010

Citation Metrics:
Cited by: 4works
Citation information provided by
Web of Science

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  • An acoustic time of flight technique is described in detail for measuring the elastic constants of cubic single crystals that allows for the constants to be determined at elevated temperature. Although the overall technique is not new, various aspects of the present work may prove extremely useful to others interested in finding these values, especially for aerospace materials applications. Elastic constants were determined for the nickel based alloy, Hastelloy X from room temperature to 1,000 C. Accurate elastic constants were needed as part of an effort to predict both polycrystal mechanical properties and the nature of grain induced heterogeneous mechanicalmore » response. The increased accuracy of the acoustically determined constants resulted in up to a 15% change in the predicted stresses in individual grains. These results indicate that the use of elastic single crystal constants of pure nickel as an approximation for the constants of gas turbine single crystal alloys, which is often done today, is inaccurate.« less
  • Tensile behavior of a new single-crystal nickel-based superalloy with rhenium (CMSX-4) was studied at both room and elevated temperatures. The investigation also examined the influence of [gamma][prime] precipitates (size and distribution) on the tensile behavior of the material. Tensile specimens were prepared from single-crystal CMSX-4 in [001] orientation. The test specimens had the [001] growth direction parallel to the loading axis in tension. These specimens were given three different heat treatments to produce three different [gamma][prime] precipitate sizes and distributions. Tensile testing was carried out at both room and elevated temperatures. The results of the present investigation indicate that yieldmore » strength and ultimate tensile strength of this material initially increases with temperature, reaches a peak at around 800 C, and then starts rapidly decreasing with rise in temperature. Both yield and tensile strength increased with increase in average [gamma][prime] precipitate size. Yield strength and temperature correlated very well by an Arrhenius type of relationship. Rate-controlling process for yielding at very high temperature (T [ge] 800 C) was found to be the dislocation climb for all three differently heat-treated materials. Thermally activated hardening occurs below 800 C whereas above 800 C thermally activated softening occurs in this material.« less
  • Tensile behavior of a new single-crystal nickel-based superalloy with rhenium (CMSX-4) was studied at both room and elevated temperatures. The investigation also examined the influence of [gamma][prime] precipitates (size and distribution) on the tensile behavior of the material. Tensile specimens were prepared from single-crystal CMSX-4 in [001] orientation. The test specimens had the [001] growth direction parallel to the loading axis in tension. These specimens were given three different heat treatments to produce three different [gamma][prime] precipitate sizes and distributions. Tensile testing was carried out at both room and elevated temperatures. The results of the present investigation indicate that yieldmore » strength and ultimate tensile strength of this material initially increases with temperature, reaches a peak at around 800 C, and then starts rapidly decreasing with rise in temperature. Both yield and tensile strength increased with increase in average [gamma][prime] precipitate size. Yield strength and temperature correlated very well by an Arrhenius type of relationship. Rate-controlling process for yielding at very high temperature (T [ge] 800 C) was found to be the dislocation climb for all three differently heat-treated materials. Thermally activated hardening occurs below 800 C whereas above 800 C thermally activated softening occurs in this material.« less