纯铝粉末烧结体锥形件高压扭转有限元模拟及实验
FEM and experiment on the high-pressure torsion of cone-shaped part prepared by Pure Al Powder Sintered Material
针对纯铝粉末烧结材料，采用可压缩刚塑性有限元法对高压扭转成形锥形件的过程进行数值模拟,并着重分析了成形过程的应变及相对密度的分布及变化趋势；通过高压扭转设备及模具对试样施加变形，对变形前后试样不同部位的金相组织、显微硬度和相对密度进行了研究。结果表明：高压扭转具有强烈的致密效果，模拟中试样的相对密度达0.996以上，实验中达0.98；试样不同部位的等效应变和显微硬度不同，边缘处最大，达到4.55，该处的显微硬度值也最高，达61.12kg/mm2。
cone-shaped part prepared by Pure Al powder sintered Material processed by high-pressure torsion(HPT) was studied by compressible rigid plastic FEM, the distributing and the variational trend of strain and density in HPT process were analyzed; The specimen was deformed by HPT equipment and die, Microstructure, microhardness and density of different points in undeformed and deformed specimens had been examined. The results show that HPT process is a useful tool for reducing the porosity in specimen, the relative density of specimen is above 0.996 in FEM, while it reaches to 0.98 in the experiment; the strain-effective of different points in specimen are different, it reaches to the highest in the edge of specimen, about 4.5, microhardness reaches to 61.12kg/mm2 in the edge of specimen, it is also the highest.
王晓溪、贾建磊、李萍、薛克敏、李琦
金属压力加工材料科学冶金技术
纯铝粉末高压扭转锥形件有限元模拟显微组织
powder of pure aluminumhigh-pressure torsion (HPT)cone-shaped partFEMmicrostructure
王晓溪,贾建磊,李萍,薛克敏,李琦.纯铝粉末烧结体锥形件高压扭转有限元模拟及实验[EB/OL].(2009-10-03)[2025-08-16].http://www.paper.edu.cn/releasepaper/content/200910-20.点此复制
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