Search Results - "Rosenberger, AH"

Local crack growth evaluation in a fully lamellar Ti-6Al-4V alloy using an electrothermal Crack-Tip marking technique by Pettit, R.G., Wawrzynek, P.A., Carter, B.J., Singh, R., Pilchak, A.L., Rosenberger, A.H., Velez, M., Ward, T.W.

“…•Local data from multiple orientations at once in anisotropic triplet microstructure.•Electrothermal crack tip marking process used to record multiple crack…”
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Reducing uncertainty in fatigue life limits of turbine engine alloys by Larsen, J.M., Jha, S.K., Szczepanski, C.J., Caton, M.J., John, R., Rosenberger, A.H., Buchanan, D.J., Golden, P.J., Jira, J.R.

“…In probabilistic design of materials for fracture-critical components in modern military turbine engines, a typical maximum design target risk (DTR) is 5×10−8…”
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The role of competing mechanisms in the fatigue life variability of a nearly fully-lamellar γ-TiAl based alloy by Jha, S.K., Larsen, J.M., Rosenberger, A.H.

“…The influence of competing mechanisms on the fatigue life behavior of a γ-TiAl based alloy was studied at room temperature and 600 °C. The alloy exhibited…”
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Automated extraction of symmetric microstructure features in serial sectioning images by Tschopp, M.A., Groeber, M.A., Simmons, J.P., Rosenberger, A.H., Woodward, C.

“…Serial sectioning methods continue to produce a wealth of image data for quantifying the three-dimensional nature of material microstructures. In this work, we…”
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The influence of high temperature exposure on the mechanical performance of a γ titanium aluminide alloy by Planck, S.K, Rosenberger, A.H

“…The influence of a prolonged high temperature air exposure on the tensile and fatigue behavior of a γ titanium aluminide (Ti–46Al–2Nb–2Cr–1Mo–0.2B, at.%) has…”
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The role of competing mechanisms in the fatigue-life variability of a titanium and gamma-TiAl alloy by Jha, S K, Larsen, J M, Rosenberger, A H

“…A typical crack origin in Ti-6-2-4-6 is shown in Figure 5a and 5b for the σ^sub max^ of 860 MPa. The crack nucleated across equiaxed primary α (α^sub p^)…”
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Effect of environment on the fatigue crack growth of gamma titanium aluminide alloys at ambient temperatures by Rosenberger, A.H

“…The limited ductility, low fracture toughness and steep crack growth curves of gamma alloys are major stumbling blocks to their implementation in fracture…”
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A micromechanics study of lamellar TiAl by CHANG, S, CHIANG, F. P, ROSENBERGER, A. H

“…Microdeformation patterns of lamellar TiAl specimens with various grain sizes under uniaxial tension are mapped using the micro/nano experimental mechanics…”
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Modeling thermal exposure effects on fatigue of gamma titanium aluminides by Wright, P.K, Rosenberger, A.H

“…Aircraft engine applications of gamma titanium aluminide alloys require these materials to undergo extended periods of high temperature exposure in air. In…”
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A P/M approach for the fabrication of an orthorhombic titanium aluminide for MMC applications by SMITH, P. R, ROSENBERGER, A. H, SHEPARD, M. J, WHEELER, R. IV

“…A study has been undertaken to examine the feasibility of using a powder metallurgy (P/M) approach for the fabrication of an orthorhombic (O: Ti sub 2…”
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Tape cast second generation orthorhombic-based titanium aluminide alloys for MMC applications by Smith, Paul R, Rosenberger, Andrew H, Shepard, Michael J

“…The first objective of this study is to examine the microstructural evolution and mechanical performance (with and without heat treatment) of three…”
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Creep of SiC/Ti-1100 composite in a vacuum environment by Gambone, M.L., Rosenberger, A.H.

“…This study examines the longitudinal creep behavior of a unidirectionally reinforced SiC fiber/Ti-1100 composite at 540°C in a vacuum. Primary creep behavior…”
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Mechanism-Based Variability in Fatigue Life of Ti-6Al-2Sn-4Zr-6Mo by Jha, SK, Larsen, JM, Rosenberger, AH, Hartman, GA

“…The variability in fatigue life of a Ti-6Al-2Sn-4Zr-6Mo alloy was studied. The cumulative life distribution plot was found to be composed of two distinct…”
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Effect of vacuum level on the embrittlement of timetal ®21S by Rosenberger, A.H.

“…This study indicates that a severe embrittlement occurs in Timetal 21S after relatively short exposures at 650 deg and 760 deg C. No difference in…”
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Multi-Mechanism Synergy in Variable-Amplitude Fatigue by Sunder, R, Ashbaugh, NE, Porter, WJ, Rosenberger, AH

“…Fractographic studies on Al alloys and a nickel-base super-alloy point to the combined action of three major load-interaction mechanisms in controlling crack…”
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Aging effects on the creep behavior of the near-alpha titanium alloy Ti-1100 by ROSENBERGER, A. H, MADSEN, A, GHONEM, H

“…During aging of the silicon-bearing, near- alpha titanium alloy Ti-1100 at the service temperature of 593 deg C, the precipitation of Ti sub 3 Al and silicide…”
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