Annealing Effect on Mechanical Properties of Ti-Al Alloy/Pure Ti Harmonic-Structured Composite by MM/SPS Process
Annealing Effect on Mechanical Properties of Ti-Al Alloy/Pure Ti Harmonic-Structured Composite by MM/SPS Process
复制标题
MM/SPS工艺退火对钛铝合金/纯钛调和结构复合材料力学性能的影响
DOI：
10.1088/1757-899x/63/1/012031
复制
发表时间：
2014
期刊：
影响因子：
--
通讯作者：
K. Ameyama
中科院分区：
文献类型：
--
作者：
R. Yoshida;T. Tsuda;Hiroshi Fujiwara;Hiroyuki Miyamoto;K. Ameyama
针对钛铝合金室温塑性低的问题，采用机械球磨和放电等离子烧结工艺制备了钛铝合金/纯钛简谐结构复合材料。弥散区为粗晶钛，网状区为细晶Ti-48mol%Al的谐调和结构复合材料具有较高的室温强度和塑性。研究了钛铝合金/纯钛简谐结构复合材料中显微组织的退火热处理对其力学性能的影响。在873K、973K和1073K三种温度下热处理的Ti-Al合金/纯钛简谐结构复合材料保持了TiAl网状结构和纯钛弥散区的组织结构，热处理后纯钛弥散区的平均晶粒尺寸有所粗化。在873K、973K和1073K三种温度下热处理的谐调和结构复合材料保持了较高的硬度。拉伸结果表明，在873K热处理的Ti-Al合金/纯钛简谐结构复合材料具有高的强度，特别是高的塑性。
The Ti-Al alloy/pure Ti harmonic-structured composite was produced by mechanical milling and spark plasma sintering process for improvement of low ductility at room temperature of Ti-Al alloy. The harmonic-structured composite with the dispersed area having coarse grained titanium and the network area having fine-grained Ti-48mol%Al alloy demonstrates high strength and high ductility at room temperature. The annealing effect of the microstructure on the mechanical properties in the Ti-Al alloy/pure Ti harmonic-structured composite are investigated. The microstructure of the Ti-Al alloy/pure Ti harmonic-structured composite annealed at 873K, 973 K and 1073 K are maintained the Ti-Al network structure and pure Ti dispersed regions, the average grain size of pure Ti dispersed region is only coarsen by annealing. The harmonic-structured composite annealed at 873K, 973K and 1073 K are maintained the high hardness. The tensile results reveal that the Ti-Al alloy/pure Ti harmonic- structured composite annealed at 873K exhibits high strength and especially high ductility.