skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: On the ultimate tensile strength of tantalum

ORCiD logo; ; ; ;
Publication Date:
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR) (SC-21)
OSTI Identifier:
Grant/Contract Number:
NA0002080; AC52-06NA25396
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Acta Materialia
Additional Journal Information:
Journal Volume: 126; Journal Issue: C; Related Information: CHORUS Timestamp: 2018-02-09 04:13:11; Journal ID: ISSN 1359-6454
Country of Publication:
United States

Citation Formats

Hahn, Eric N., Germann, Timothy C., Ravelo, Ramon, Hammerberg, James E., and Meyers, Marc A.. On the ultimate tensile strength of tantalum. United States: N. p., 2017. Web. doi:10.1016/j.actamat.2016.12.033.
Hahn, Eric N., Germann, Timothy C., Ravelo, Ramon, Hammerberg, James E., & Meyers, Marc A.. On the ultimate tensile strength of tantalum. United States. doi:10.1016/j.actamat.2016.12.033.
Hahn, Eric N., Germann, Timothy C., Ravelo, Ramon, Hammerberg, James E., and Meyers, Marc A.. Wed . "On the ultimate tensile strength of tantalum". United States. doi:10.1016/j.actamat.2016.12.033.
title = {On the ultimate tensile strength of tantalum},
author = {Hahn, Eric N. and Germann, Timothy C. and Ravelo, Ramon and Hammerberg, James E. and Meyers, Marc A.},
abstractNote = {},
doi = {10.1016/j.actamat.2016.12.033},
journal = {Acta Materialia},
number = C,
volume = 126,
place = {United States},
year = {Wed Mar 01 00:00:00 EST 2017},
month = {Wed Mar 01 00:00:00 EST 2017}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1016/j.actamat.2016.12.033

Citation Metrics:
Cited by: 3works
Citation information provided by
Web of Science

Save / Share:
  • In conventional composite structures a property F can often be related to the properties of the individual components through the rule of mixtures (ROM). Metal-matrix structures in which the second metal B is finely dispersed can have properties that deviate strongly from the ROM. Several binary systems have been extensively investigated, notably Cu-Nb and Ag-Cu. These binary mixtures are typically produced by means of casting or powder metallurgy. The powder metallurgy (PM) route allows the production of a billet without melting, and can prevent the formation of solid solutions. Mechanical deformation to high strains of these casts or PM billetsmore » by extrusion and wire drawing produces a very fine filament size of the minority phase. These microcomposites have a filament thickness in the range of 10-200 nm or less. At high [eta] (strain) the ultimate tensile stress (UTS) of the mixtures exceeds the UTS calculated with the rule of mixtures UTS[sub ROM]. For proper UTS[sub ROM] calculations UTS values of the pure constituents that have been strained over a comparable range must be used. In a recent study Spitzig measured a UTS of 1400 MPa for cast Nb deformed to [eta] = 11.5. In the present work a 100% Nb wire using Nb powder, deformed to [eta] = 12.8, had a UTS of 1440 MPa. For cu the authors assumed 495 MPa (1) at [eta] = 11.5. The authors found similar strengthening effects in Al-Nb PM wires. The strengthening is measured in wires in which Al is the majority phase, but also in wires with Nb as the majority phase.« less
  • The ultimate tensile strength (UTS) of metal and intermetallic matrix unidirectional composites can be significantly lower than expected from the rule of mixtures prediction. One possible explanation is that the fibers in the as-processed state are in a residual state of stress and in some cases are broken because of the inhomogeneous nature of the densification during manufacture. Three main results emerge from the effort to include the effect of this processing damage on the composite UTS. First is the development of a simple but accurate analytical version of Curtin`s model for predicting the stress-strain response and UTS of thismore » class of composites. Second is the generalization of Curtin`s model to include both process induced fiber bending and fracture. Third is that the reduction in strength is a sensitive function of the consolidation conditions; thus a link is established between the quality of the composite and the conditions of its manufacture.« less
  • The tensile strength of ceramic and metal matrix composites is subject to an important role of the fiber/matrix interface. The mechanical properties of this interface dictate the stress concentration that develops in fibers that surround a failed fiber. An analysis of this phenomenon is used to illustrate interface conditions that sufficiently diminish the stress concentration that a global load sharing criterion may be used to prescribe the contribution of the fibers to the composite strength. This, in turn, leads to a criterion for the transition to failure by local load sharing.