On the temperature dependent strengthening of nickel by transition metal solutes

Rehman HU, Burst K, Neumeier S, Sato A, Reed R, Göken M (2017)

Publication Status: Published

Publication Type: Journal article

Publication year: 2017

Journal

Acta Materialia Elsevier

Publisher: PERGAMON-ELSEVIER SCIENCE LTD

Book Volume: 137

Pages Range: 54-63

DOI: 10.1016/j.actamat.2017.05.038

Abstract

Fundamental insights are presented into the factors influencing the temperature-dependent strengthening of nickel by transition metal solutes. Strain rate jump tests are used using the alloying elements Ta, W and Re which lie beside one another in the d-block. At 800 degrees C, the hardening induced by Ta is significantly greater than that by W and Re. At T >= 1000 degrees C, Re becomes more potent than Ta at slow strain rates; at 1200 degrees C it is the most effective at all the strain rates employed. The results are interpreted using theory for temperature-dependent strengthening that emphasises solute dislocation interaction. It is confirmed that at low temperatures the solute strengthening is controlled by paraelastic interaction the solute with the largest size difference with the host Ni is the most potent. At higher temperatures, the evidence indicates that solutes collect on dislocations such that the slowest diffusing solutes confer maximal resistance to dislocation glide and climb; thus Re is particularly potent. The findings elucidate the role of transition metal solutes in strengthening. Moreover, they provide the necessary quantitative data for ongoing alloy design efforts. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

Authors with CRIS profile

Steffen Neumeier Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften) Mathias Göken Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften)

Related research project(s)

A06 (FP3): Miko- und nanomechanische Charakterisierung von Superlegierungen bei hohen Temperaturen (SFB/TRR 103) SFB/TRR 103 Jan. 1, 2020 - Dec. 31, 2023

Involved external institutions

University of Oxford GB United Kingdom (GB) Technische Universität Darmstadt DE Germany (DE)

How to cite

APA:

Rehman, H.U., Burst, K., Neumeier, S., Sato, A., Reed, R., & Göken, M. (2017). On the temperature dependent strengthening of nickel by transition metal solutes. Acta Materialia, 137, 54-63. https://dx.doi.org/10.1016/j.actamat.2017.05.038

MLA:

Rehman, Hamad Ur, et al. "On the temperature dependent strengthening of nickel by transition metal solutes." Acta Materialia 137 (2017): 54-63.

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