...Dongsheng Li; Curt Lavender Improving yield strength and asymmetry is critical to expand applications of magnesium alloys in industry for higher fuel efficiency and lower CO 2 production. Grain refinement is an efficient method for strengthening low symmetry magnesium alloys, achievable...

... cracks grain size magnesium alloys nucleation damage crack aluminium bimodal grain size ultrafine grain Nanocrystalline metals with grain sizes in the range of 10–500 nm have been synthesized in an attempt to improve the strength of these materials, according to the traditional Hall...

... fatigue testing fractography friction friction welding kink bands magnesium alloys With the increased interest in achieving improved fuel economy in automobiles, the need for lightweight alloys is essential. While only marginally employed in current automobile designs, recent advances have...

... MPa for internal pressurization, and 300 ° C for forming temperature. Using this testing machine, experiments of T-shape protrusion of magnesium alloy AZ61 tubes at elevated temperatures are carried out. A commercial finite element code DEFORM 3D is used to simulate the plastic deformation of the tube...

... liquid metals magnesium alloys manganese alloys mechanical strength porosity rheology segregation silicon alloys titanium alloys zinc alloys rheology forging process electro magnetic stirring (EMS) forging-pressure liquid segregation Because semisolid state processing has...

.... , 2009 , “ Modeling the Effect of Twinning and Detwinning During Strain-Path Changes of Magnesium Alloy AZ31 ,” Int. J. Plast. 0749-6419 , 25 , pp. 861 – 880 . 10.1016/j.ijplas.2008.05.005 Li , D. Y. , Chang , Q. F. , Peng , Y. H. , and Zeng , X. Q. , 2007 , “ Thermo...

... Technology Corporation , Livermore, CA . 19 07 2007 17 11 2008 06 03 2009 aluminium alloys cracks deformation ductile fracture iron alloys magnesium alloys nucleation percolation porosity sheet materials silicon alloys tensile testing voids (solid) X-ray microscopy...

...Benoît Beausir; László S. Tóth; Fathallah Qods; Kenneth W. Neale Torsion experiments were carried out on pure magnesium (99.9%) and the magnesium alloy AZ71 under free-end conditions of testing. The alloy had an axisymmetric initial texture, while the pure Mg samples were prepared from a rolled...

... 2008 13 03 2008 aluminium alloys copper alloys cracks magnesium alloys plastic flow point defects slip thermomechanical treatment voids (solid) X-ray scattering aluminum Guinier radius nanovoids quenching SAXS strain rate sensitivity thermally activated deformation...

... computerised tomography flaw detection magnesium alloys nucleation slip superplasticity voids (solid) superplasticity damage nucleation coalescence X-ray tomography Superplasticity is the ability for a given material to exhibit particularly large elongations to fracture for appropriate...

...Sp. G. Pantelakis; N. D. Alexopoulos; A. N. Chamos The potential of cast magnesium alloys for being used as structural materials in lightweight applications is assessed. The ability of the alloys for mechanical performance is evaluated and compared against the ability of widely used structural...

...Rimma Lapovok; Peter D. Hodgson Despite the high demand for industrial applications of magnesium, the forming technology for wrought magnesium alloys is not fully developed due to the limited ductility and high sensitivity to the processing parameters. The processing window for magnesium alloys...

... 2004 01 09 2006 aluminium alloys magnesium alloys plastic flow Portevin-Le Chatelier effect strain ageing sheet materials stress relaxation polishing tensile strength nucleation Plastic flow in metals and alloys at ambient condition is originated from generation and motion...

...L. Zhu; A. J. Beaudoin; S. R. MacEwen Time-dependent relaxation processes continue after forming of sheet metal components. Mechanical properties and even the shape of the part may evolve with time. Beverage can ends, made of an aluminum-magnesium alloy, provide one example of relaxation in a metal...

... by the Materials Division August 20, 2002; revision received February 3, 2003. Associate Editor: W. Soboyejo. 20 August 2002 03 February 2003 22 01 2004 aluminium alloys magnesium alloys silicon alloys interface structure laser beam welding optical microscopy atomic force microscopy...

... and A. Karlsson. 10 January 2003 17 June 2003 22 09 2003 machining silicon compounds particle reinforced composites aluminium alloys copper alloys magnesium alloys iron alloys nickel alloys abrasion laser hardening scanning electron microscopy The term Metal Matrix...

... below along with a note in the figure caption to indicate that the thickness is ≈6.3 mm. 30 09 2002 aluminium alloys magnesium alloys welding internal stresses neutron diffraction recrystallisation 2 Arcan specimen with location of friction stir weld. Thickness≈6.3 mm...

... internal stresses cold working fatigue cracks recovery copper alloys magnesium alloys zinc alloys Cold Expansion Process Residual Stress Finite Element Analysis Compressive residual stresses around fastener holes enhance the fatigue life of service components...

... received by the Materials Division March 23, 2001; revised manuscript received July 20, 2001. Associate Editor: S. Mall. 23 03 2001 20 07 2001 26 03 2002 aluminium alloys copper alloys magnesium alloys welding internal stresses neutron diffraction...

... Editor: G. Johnson. 01 February 2000 05 February 2001 bending drawing (mechanical) plasticity aluminium alloys magnesium alloys silicon alloys stress-strain relations Springback is the tendency for sheet metal parts to change shape after unloading and removal from...