搜索结果: 1-8 共查到“金属材料 ECAP”相关记录8条 . 查询时间(0.469 秒)
连续柱状晶Cu-ECAP中的晶界演变及其与剪切带的交互作用
连续柱状晶Cu 等通道转角挤压 晶界演变 剪切行为
2019/11/5
金属发生塑性变形时形成的剪切带在高应变状态下会被分割为孪晶-基体片层状组织,而纳米尺度的孪晶界能实现材料强塑性的高度匹配。因此,利用等通道转角挤压(ECAP)技术研究剪切带的形成与作用可为材料的强塑性匹配提供有效支持。通过对具有特殊晶界角度的连续柱状晶纯Cu进行1道次ECAP变形,研究变形过程中晶界的演变,分析变形过程中剪切带的形成机制及与晶界的交互作用,测试了不同晶界角度试样变形后的力学性能。结...
在500℃采用C方式ECAP变形制备了亚微晶45钢, 用光学显微镜(OM)、透射电子显微镜(TEM)和电子衍射(SAED)等分析技术对其进行表征, 研究了铁素体组织的演变特征和晶粒细化机制。结果表明: 在初始变形道次后, 原始的粗大铁素体晶粒因剧烈剪切变形而沿着剪切变形的方向形成剪切变形带, 在其内大量的具有亚微米尺寸的板条状位错胞或亚晶使铁素体晶粒显著细化。进一步变形使板条状位错胞或亚晶组织继续...
Microstructure and properties of α + β brass after ECAP processing
ECAP Severe plastic deformation Ultra-fine grained materials
2010/1/11
Purpose of this paper is to determine the effect of Equal Channel Angular Pressing (ECAP) processing on the microstructure and hardness of α+β brasses. The effect of deformation temperature an...
Influence of change of direction of deformation at ECAP technology on achieved UFG in AlMn1Cu alloy
Plastic Forming ECAP process of AlMn1Cu alloy Structure analysis
2009/12/14
Purpose: of this paper is to extend a complex evaluation of aluminium alloy, which requires very often knowledge of behaviour of deformation at the ECAP process and achieved strengthening, intensity o...
Influence of severe plastic deformation by the ECAP method on structure and properties of the P2-04BCh steel
Nanomaterials Low-carbon steel ECAE deformation
2009/12/3
Purpose: Maim aim of this paper is to describe the plastic deformation executed by ECAE of low carbon steel. The ECAE method lead to significant improvement of strength of investigated material.
Desi...
Purpose: Main aim of this paper is to describe the plastic deformation executed by ECAP on low cycle fatigue
of steel AISI 316. Among others was attention fixed on mechanical properties after this tr...
ECAP法制备超细晶铝合金材料的超塑性行为
等径弯曲通道变形 超细晶材料 Al-3%Mg-0.5%Zr合金
2010/3/19
研究经多道次等径弯曲通道变形后Al-3%Mg-0.5% Zr铝合金的超塑性行为。研究表明： 晶粒尺寸由变形前的50μm经过8道次等径弯曲通道变形后细化为0.3μm; 随后， 在330℃退火保温1h的条件下， 其晶粒尺寸长大至10μm； 在500℃、应变速率1×10-3s-1的拉伸实验中，该超细晶材料的最大延伸率高达370%，呈现出良好的超塑性。