【摘 要】
:
The cylindrical billets of a Mg-3AI-1Zn (AZ31 alloy were synthesized by spray deposition processing.The microstructure evolution and mechanical properties of th
论文部分内容阅读
The cylindrical billets of a Mg-3AI-1Zn (AZ31 alloy were synthesized by spray deposition processing.The microstructure evolution and mechanical properties of the alloy were investigated.The results reveal that the microstmcture of the AZ31 alloy is refined significantly by spray deposition processing.A homogeneous and equiaxial-grain structure with an average grain size of 17 μm is obtained.Further grain refinement with an average grain size of 5 μm is attributed to dynamic recrystallization during extrusion processing.The great increase in the density of grain boundary nucleation sites by the freer initial grain sizes makes the dislocation pile-ups near subgrain boundaries being absorbed easily by the boundaries,resulting in an accelerated recrystallization process.The average tensile ultimate and yield strengths of the extruded rods are 321 MPa and 237 MPa,respectively,with an elongation of 15.2% at room temperature,which are remarkably higher than those of the conventional as-cast AZ31 alloy.
其他文献
We propose a stochastic level value approximation method for a quadratic integer convex minimizing problem in this paper. This method applies an importance samp
Phase synchronization between nonlinearly coupled systems With 1:1 and 1:2 resonances is investigated.BY introducing a concept of phase for a chaotic motion.it
在社会经济高速发展、科学技术高度进步的今天,需要强化各级领导的安全责任意识,落实安全生产责任制,加强对安全生产工作的领导;安全工作的关键是要防患于未然,安全生产检查
In order to study the luminescent properties of ternary rare earth complexes with fl-diketone ligand,three new β-diketone ligands,1-phenyl-3-(p-phenylethynylph
Y2O3:Er3+ ultrafine phosphors with a varying Yb3+ ion concentration were prepared by a urea homogeneous precipitation method.The results of XRD show that all th
The films of GaP nanocrystals embedded in SiO2 matrix were prepared by radio frequency magnetron co-sputtering and subsequent anneal- ing technology. The struct
In this study, La2O3 was investigated as an additive to TiC/W composites. The composites were prepared by vacuum hot pressing, and the microstructure and mechan
A new technology characterized by rapidly non-mechanical settlement of unclassified tailings was developed based on a large number of tests,and dynamic settleme
To solve the problem of poor anti-noise performance of the traditional fuzzy C-means (FCM) algorithm in image segmentation,a novel two-dimensional FCM clusterin
The effects of Cu addition and annealing treatment on the magnetic properties and microstructure of Nd12.3Fe81.7-xCuxB6 (x=0-1.2 ribbons melt-spun and annealed