[PDF] Top 20 Combined Effect of Pre Straining and Pre Aging on Bake Hardening Behavior of an Al 0 6 mass%Mg 1 0 mass%Si Alloy

... without pre-strain and with 3% pre-strain at each stage of heat treatments: ...before pre-aging HV ðBPÞ, after pre-aging at 298–373 K for ...final aging at 443 K for 2.4 ... See full document

... natural aging. The present authors 8) reported that the alloys pre-aged at 343­383 K showed natural age hardening during the sufficiently long term exposure at room temperature and resultantly the ... See full document

... with lattice parameters a ¼ 0:496 nm, b ¼ 0:859 nm and c ¼ 0:848 nm. Teleshov et al. 14) reported that a high Cu : Mg ratio of about 16 with 0.6% Ag increased considerably the strength ... See full document

... to Alloy A, the density of the grain boundary precipitation (β ́) of the alloy B is ...well alloy B has intermittent grain boundary precipitation phase, which can cut off the anode corrosion channel ... See full document

... the effect of the Mn addition and pre-aging time on the hardness of the primary α-Al and the eutectic in AS and ASMn, hardness measurements were performed, avoiding Fe-based compounds, using ... See full document

... K aging by SEM observation. It seems that the primary cause of hardening is the solid-solution harden- ing by Mg and Si atoms as -Al ...of Al-10 mass%Si- 0.8 ... See full document

... temperature of the castings had dropped to approximately 498­513 K for die casting (hereafter referred to as the “503 K demolded-DC castings”) and to 473 K and 773 K for permanent mold casting (hereafter referred to as ... See full document

... of Si and Ge atoms in the matrix of 6C material aged at 373 K occurs slower than that aged at 473 K, the formation of grain boundary precipitates is suppressed, and the concentration of Si and Ge in the ... See full document

... Ca-added alloy, the kinetics of the initial age- hardening is accelerated at all aging temperatures and the peak hardness increased from ³85 to ³92 HV at 403 K and from ³87 to ³91 HV at 433 K by the ... See full document

... the pre-aging period on the formation behavior of nanoclusters during two-step aging in an ...) alloy has been investigated by the hardness, differential scanning calorimetry (DSC) and ... See full document

... As shown in Fig. 4(b), sheet B subjected to a fi nal annealing of 573 K exhibited a large change in the inclination angle of the basal pole, which is evidence of recrystallization. However, the Erichsen value of sheet B ... See full document

... Alloy Al-8%mass.Mg was prepared for the investigation by vacum induction melting of the elements (Al and Mg) of high purity. The ingots were then homogenized at 440˚C for 44 hours followed by ... See full document

... and 6 would suggest that the sharpness and sphericity of the electron diffraction spots in all three zone-axis diffraction patterns, combined with the observation that all main diffraction spots are perfectly ... See full document

... tion on grain refinement is clearly weaker than obtained previously through equal channel angular pressing (ECAP) and high-pressure torsion (HPT). 9­12) In addition, the dislocations do not accumulate in large numbers in ... See full document

... Creep tests were carried out under a constant-load using a creep machine equipped with a three zone furnace (manu- factured by Applied Test System Inc., Butler, PA). The extension of the specimen was measured by using a ... See full document

... The microstructure of some selected as-corroded samples after electrochemical corrosion study using SEM indicates some traces of cracks and pronounced pits; showing that the samples have suffered pitting corrosion attach ... See full document

... Weight saving materials are extremely effective for reducing the mass of transportation system. Magnesium alloys are the lightest of all practical metallic alloys for structures. They posses excellent mechanical ... See full document

... As shown in Fig. 1, the ST-ARB specimen shows mainly Copper texture after 10-cycle ARB. The texture changes with increasing the annealing temperature, and a complicated and relatively weak texture develops after ... See full document

... 8He mass [Ce66] , and the ( He, He) reaction on N = Z targets has since proved invaluable for the study of proton-rich ...Ca(J)He,11C)4 0 S [Ko80] ... See full document

... peak aging, these continuous grain boundary precipitates are very sensitive to the stress corrosion (SCC) and exfoliation ...7xxx alloy, metastable ... See full document