摘要管状高压剪切(Tube High-Pressure Shearing,t-HPS)是一种利用扭转剪切应力单步骤制备层状复合材料的剧烈塑性变形(Severe Plastic Deformation,SPD)方法。本文研究不同纯度高纯铝管在不同应变量下的复合情况,利用电子扫描显微镜(scanning electron microscope,SEM)和电子背散射衍射技术(Electron Backscattered Diffraction,EBSD)对不同应变量下的复合界面的微观组织进行检测,分析复合材料晶粒尺寸与所受应变量之间的关系;对不同应变量下的复合管进行显微硬度及拉伸测试,通过退火处理比较退火前后微观组织和力学性能的变化。发现剪切应变对纯铝复合材料的组织晶粒细化和力学性能改变有明显影响。87810
毕业论文关键词 管状高压剪切 纯铝 显微组织 力学性能
毕业设计说明书外文摘要
Title Investigation of microstructure and properties of high pure aluminum by tube high-pressure shearing
Abstract Tube High-Pressure Shearing is a kind of severe plastic deformation method to prepare layered composite material by single step of torsional shear stress。 In this paper, we study different purity of high purity aluminum in different variable strain of the compound, the microstructure and mechanical properties of changes in different variable strain of the composite interface microstructure were detected by SEM and EBSD techniques to analyse composite material grain size and the relationship between variable strain ; Testing microhardness and tensile property for the different variable strain of the composite pipes, through annealing treatment comparing microstructure and mechanical property of composite before and after 。 It is found that the shear strain has a significant effect on the microstructure and mechanical properties of pure aluminum composite。
Keywords t-HPS pure aluminum microstructure mechanical properties
目 次
1 绪论 1
1。1 研究背景 1
1。2 剧烈塑性变形 1
1。2。1 累积叠轧(Aaccumulative roll bonding,ARB) 1
1。2。2 高压管扭转(High-Pressure tube twisting,HPTT) 4
1。2。3 管状高压剪切(Tube High-Pressure Shearing,t-HPS) 5
1。3 课题研究的内容、目标和创新性 7
1。3。1 课题研究内容 7
1。3。2 课题研究目标 8
1。3。3 课题的创新性 8
2 实验材料及方案 9
2。1 实验材料 9源-于,优Y尔E论W文.网wwW.yOueRw.com 原文+QQ752018`766
2。2 实验计划和方案 9
2。2。1 实验计划 9
2。2。2 实验方案 10
2。3 实验设备 10
2。4 实验方法 11
2。4。1 高压剪切变形 11
2。4。2 EBSD样品制备 11
2。4。3 显微硬度测试 11
2。4。4 拉伸力学试样 11
2。4。5 退火处理 12