Search Results - "Agnew, Sean R."

Dislocation transmutation by tension twinning in magnesium alloy AZ31 by Wang, Fulin, Agnew, Sean R.

“…The interaction between dislocations and {101¯2}〈1¯011〉 twins appears to play an important role in the strain hardening behavior of Mg. Detailed transmission…”
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Effect of precipitate shape and orientation on Orowan strengthening of non-basal slip modes in hexagonal crystals, application to magnesium alloys by Wang, Fulin, Bhattacharyya, Jishnu J., Agnew, Sean R.

“…Orowan equations predicting the strengthening of non-basal slip systems in hexagonal crystals are derived for rationally distributed, shear resistant…”
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Plastic anisotropy and the role of non-basal slip in magnesium alloy AZ31B by Agnew, Sean R., Duygulu, Özgür

“…Mechanistic explanations for the plastic behavior of a wrought magnesium alloy are developed using a combination of experimental and simulation techniques…”
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High Strength and Ductility of Additively Manufactured 316L Stainless Steel Explained by Shamsujjoha, Md, Agnew, Sean R., Fitz-Gerald, James M., Moore, William R., Newman, Tabitha A.

“…Structure–property relationships of an additively manufactured 316L stainless steel were explored. A scanning electron microscope and electron backscattered…”
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Modeling the effect of twinning and detwinning during strain-path changes of magnesium alloy AZ31 by Proust, Gwénaëlle, Tomé, Carlos N., Jain, Ashutosh, Agnew, Sean R.

“…Hexagonal materials deform plastically by activating diverse slip and twinning modes. The activation of such modes depends on their relative critical stresses,…”
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The texture and anisotropy of magnesium–zinc–rare earth alloy sheets by Bohlen, Jan, Nürnberg, Marcus R., Senn, Jeremy W., Letzig, Dietmar, Agnew, Sean R.

“…In this paper, the rolling textures of six magnesium alloys containing different levels of zinc and rare earth (RE, e.g. mischmetal or Y) additions are…”
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Role of Solute in the Texture Modification During Hot Deformation of Mg-Rare Earth Alloys by Hadorn, Jason P., Hantzsche, Kerstin, Yi, Sangbong, Bohlen, Jan, Letzig, Dietmar, Wollmershauser, James A., Agnew, Sean R.

“…Although conventional Mg alloys develop strong crystallographic textures during deformation that persist during annealing, the addition of rare earth (RE)…”
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Crystal plasticity-based forming limit prediction for non-cubic metals: Application to Mg alloy AZ31B by John Neil, C., Agnew, Sean R.

“…A viscoplastic crystal plasticity model is incorporated within the Marciniak–Kuczynski (M–K) approach for forming limit curve prediction. The approach allows…”
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Using polycrystal plasticity modeling to determine the effects of grain size and solid solution additions on individual deformation mechanisms in cast Mg alloys by Raeisinia, Babak, Agnew, Sean R.

“…The tensile and compressive yielding of cast Mg–Zn alloys, with varying grain sizes and compositions ranging from 0 to 2.3 at.% Zn, are simulated using a…”
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Effects of Solute and Second-Phase Particles on the Texture of Nd-Containing Mg Alloys by Hadorn, Jason P., Hantzsche, Kerstin, Yi, Sangbong, Bohlen, Jan, Letzig, Dietmar, Agnew, Sean R.

“…Hot-rolled, binary Mg-Nd alloys with compositions ≥0.095 at. pct undergo the texture weakening phenomenon that has been reported in a number of Mg–rare earth…”
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Effects of laser ablation coating removal (LACR) on a steel substrate: Part 1: Surface profile, microstructure, hardness, and adhesion by Shamsujjoha, Md, Agnew, Sean R., Melia, Mike A., Brooks, James R., Tyler, Terry J., Fitz-Gerald, James M.

“…The effects of laser ablation coating removal (LACR) from a high strength shipbuilding steel have been assessed. The LACR process was shown to be effective for…”
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Texture Weakening Effects in Ce-Containing Mg Alloys by Hadorn, Jason P., Mulay, Rupalee P., Hantzsche, Kerstin, Yi, Sangbong, Bohlen, Jan, Letzig, Dietmar, Agnew, Sean R.

“…The purpose of the present study is to elucidate the cause of a texture transition observed in hot-rolled Mg-Ce alloys, with increasing Ce content. More dilute…”
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Effect of Environment on Fatigue Crack Wake Dislocation Structure in Al-Cu-Mg by Ro, Yunjo, Agnew, Sean R., Gangloff, Richard P.

“…Fatigue-induced dislocation structure was imaged at the crack surface using transmission electron microscopy (TEM) of focused ion beam (FIB)-prepared cross…”
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α-Mg/LPSO (Long-Period Stacking Ordered) phase interfaces as obstacles against dislocation slip in as-cast Mg-Zn-Y alloys by Mayama, Tsuyoshi, Agnew, Sean R., Hagihara, Koji, Kamura, Kentaro, Shiraishi, Kazuma, Yamasaki, Michiaki, Kawamura, Yoshihito

“…•The α-Mg/LPSO (Long-Period stacking Ordered) phase interfaces in as-cast Mg-Zn-Y alloys act as effective obstacles to slip/twin activity.•The influence of the…”
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Ultrasonic Attenuation Due to Grain Boundary Scattering in Pure Niobium by Zeng, Fei, Agnew, Sean R., Raeisinia, Babak, Myneni, Ganapati R.

“…Experimental confirmation of various grain scattering theories exist but there are still outstanding questions concerning the characterization of…”
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Exploring stress equivalence for solid solution strengthened Mg alloy polycrystals by Shabana, Mohammed A., Bhattacharyya, Jishnu J., Niewczas, Marek, Agnew, Sean R.

“…The principle of “stress equivalence” proposed by Basinski et al. offers insight regarding the nature of thermally activated plasticity of solid solution…”
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Crystallography of Fatigue Crack Propagation in Precipitation-Hardened Al-Cu-Mg/Li by RO, Yunjo, AGNEW, Sean R, GANGLOFF, Richard P

“…A combined electron backscatter diffraction (EBSD)/stereology method successfully quantifies the orientation of fatigue crack surfaces for Al-Li-Cu and…”
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The effect of twin–twin interactions on the nucleation and propagation of {101¯2} twinning in magnesium by El Kadiri, Haitham, Kapil, J., Oppedal, A.L., Hector, L.G., Agnew, Sean R., Cherkaoui, M., Vogel, S.C.

“…Electron backscattered diffraction serial image analyses on AM30 magnesium alloy compressed under profuse {101¯2} twinning conditions at different strain…”
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Large rotations of the grain-scale stress tensor during yielding set the stage for failure by Bhattacharyya, Jishnu J., Pagan, Darren C., Agnew, Sean R.

“…•Rotations of the stress tensor in individual grains are experimentally quantified.•These stress rotations are an order of magnitude larger than lattice…”
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Lightweight, low cost compositionally complex multiphase alloys with optimized strength, ductility and corrosion resistance: Discovery, design and mechanistic understandings by Bhattacharyya, Jishnu J., Inman, Samuel B., Wischhusen, Mark A., Qi, Jie, Poon, Joseph, Scully, John R., Agnew, Sean R.

“…[Display omitted] •An efficient Machine Learning algorithm is used to assist down-selection from an otherwise prohibitively large alloy space.•An alloy having…”
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