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| 1 | Sequential slip transfer of mixed-character dislocations across Σ3 coherent twin boundary in FCC metals: a concurrent atomistic-continuum study显示文摘Sequential slip transfer across grain boundaries(GB)has an important role in size-dependent propagation of plastic deformation in polycrystalline metals.For example,the Hall–Petch effect,which states that a smaller average grain size results in a higher yield stress,can be rationalised in terms of dislocation pile-ups against GBs.In spite of extensive studies in modelling individual phases and grains using atomistic simulations,well-accepted criteria of slip transfer across GBs are still lacking,as well as models of predicting irreversible GB structure evolution.Slip transfer is inherently multiscale since both the atomic structure of the boundary and the long-range fields of the dislocation pile-up come into play.In this work,concurrent atomistic-continuum simulations are performed to study sequential slip transfer of a series of curved dislocations from a given pile-up onΣ3 coherent twin boundary(CTB)in Cu and Al,with dominant leading screw character at the site of interaction.A Frank-Read source is employed to nucleate dislocations continuously.It is found that subject to a shear stress of 1.2 GPa,screw dislocations transfer into the twinned grain in Cu,but glide on the twin boundary plane in Al.Moreover,four dislocation/CTB interaction modes are identified in Al,which are affected by(1)applied shear stress,(2)dislocation line length,and(3)dislocation line curvature.Our results elucidate the discrepancies between atomistic simulations and experimental observations of dislocation-GB reactions and highlight the importance of directly modeling sequential dislocation slip transfer reactions using fully 3D models. | Shuozhi Xu Liming Xiong Youping Chen David L McDowell | 2016 | npj Computational Materials2016，，1： | 4 |
| 2 | Plasticity in plolycrystalline fretting fatigue contacts 显示文摘 | Goh C H McDowell D L Neu R W | 2006 | J Mech Phys Solids2006，54，： | 1 |
| 3 | Microstructure-based Fatigue Modeling of Cast A356- T6 Alloy显示文摘 | D L McDowell K Gall M F Horstemeyer | 2003 | Engineering Fracture Mechanics2003，70，1： | 1 |
| 4 | Measurement of total soil suction using filter paper: investigation of common filter papers, alternative media and corresponding confidence显示文摘 | Rainwater N R McDowell L A Drumm E C | 2012 | Geotechnical Testing Journal2012，35，： | 1 |
| 5 | Cyclic thermomechanical behavior of a polyerystalline pseudoelastic shape memory alloy 显示文摘 | Lim T J McDowell D L | 2002 | Journal of the Mechanics and Physics of Solids2002，50，3： | 1 |
| 6 | In vivo response of polylactic acid-alginate scaffolds and bone marrow-derived cells for cartilage tissue engineering显示文摘 | Wayne J S McDowell C L Shields K J | 2005 | Tissue Eng2005，11，56： | 1 |
| 7 | Plant nutrient losses in runoff from conservation tillage on corn 显示文摘 | McDowell L L McGregor K C | 1984 | Soil & Tillage Research1984，4，1： | 1 |
| 8 | Transversely isotropic viscoplasticity model for a directionally solidified Ni-base superalloy显示文摘 | Shenoy M M McDowell D L Neu R W | 2006 | International Journal of Plasticity2006，22，12： | 1 |
| 9 | In-plane stiffness and yield strength of periodic metal honeycombs显示文摘 | Wang A J McDowell D L | 2004 | ASME Journal of Engineering Materials and Technology2004，126，： | 1 |
| 10 | Yield surfaces of various periodicmetal honeycombs at intermediate relative density显示文摘 | Wang A J McDowell D L | 2005 | Int JPlasticity2005，21，： | 1 |
| 11 | Solvent extraction of lithium显示文摘 | Lee D A Taler W L Mcdowell W J | 1976 | JInorg Nucl Chem1976，30，： | 1 |
| 12 | In-plane stiffness and yield strength of periodic metal honeycombs显示文摘 | Wang A J McDowell D L | 2004 | Journal of Engineering Materials and Technology2004，126，： | 1 |
| 13 | In-plane stiffness and yield strength of periodic metal honeycombs显示文摘 | Wang A J McDowell D L | 2004 | Journal of Engineering Materials and Technolog2004，126，2： | 1 |
| 14 | Heat sink application of extruded metal honeycomb materials 显示文摘 | Dempsey B M Eisele S McDowell D L | 2005 | International Journal of Heat and Mass Transfer2005，48，34： | 1 |
| 15 | Effect of summer weather on performance of Holstein cows in the three stage of lactation 显示文摘 | Maust L E McDowell R E Hooven N W | 1972 | J Dairy Sci1972，55，： | 1 |
| 16 | 查看详情显示文摘 | Gall K Lim T J Mcdowell D L Sehitoglu H Chumlyakov Y I | | 0，，： | 1 |
| 17 | Deformation, temperature and strain rate sequence experiments on OFHC Cu显示文摘 | TANNER B MCDOWELL L | 1999 | International Journal of Plasticity1999，15，： | 1 |
| 18 | In-plane Stiffness and Yield Strength of Periodic Metal Honeycombs显示文摘 | WANG A J MCDOWELL D L | 2004 | Journal of Engi- neering Materials and Technology2004，126，2： | 1 |
| 19 | Gastrointestinal Symptoms are More Intense in Morbidly Obese Patients and are Improved with Laparoscopic Roux-en-Y Gastric Bypass显示文摘 | Ronald H Clements MD Quintin H Gonzalez MD Allen Foster MD William O Richards MD James McDowell MD Anthony Bondora MPH Henry L Laws MD | 2003 | Obesity Surgery2003，，4： | 1 |
| 20 | Determination of extraction equilibria for several metals in the development of a process designed to recover aluminium and other metals from coal combustion显示文摘 | SEELEY F G MCDOWELL W J FELKER L K | 1981 | Hydrometallurgy1981，11，6： | 1 |
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