Construction of Analysis System for Cracks and Solidification and Deformation during Solidification of Metalls

对于合金在固态高温范围内的变形行为进行了大量的实验，但由于实验难度大，对合金凝固范围内的变形行为进行的实验很少。本研究的目的是开发一种固体和液体共存范围的拉伸试验方法。我们得到了许多钢、铜合金和铝合金的强度、塑性与固相分数的关系，应变速率和合金元素对变形的依赖关系。我们还提出并开发了一种新的凝固变形模拟器，用于控制考虑裂纹的凝固组织和转变。主要研究结果如下：研究了1100、3004、6061、6063和Al-Cu二元合金的凝固变形行为。讨论了晶粒细化和应变速率的影响。引线架用铜锡合金凝固变形行为。研究了2、5、8%锡合金在凝固过程中的变形行为和固相高温范围。钢凝固变形行为得到了碳钢凝固变形的应变速率效应和不锈钢凝固变形的Si含量效应。原位凝固与变形模拟器研制了一种用于控制凝固冷却速度和高温变形的新型模拟装置。

Many experiments have been done for deformation behaviors in high temperature range in solid state of alloys, however, very few for those during solidification range because of difficulty of experiments. In this research aims are to develop a tensile testing method for coexisting range of solid and liquid which has been originally made by authors. We obtained relationship between strength and ductility and fraction of solid, dependency of strain rate and alloying elements on deformation of many steels, copper alloys and aluminum alloys. We also proposed and developed a new simulator for solidification and deformation controlling solidification structures and transformation considered with cracks. Main results obtained are as follows.1.Deformation behavior during solidification of aluminum alloysDeformation behaviors of 1100,3004,6061,6063 and Al-Cu binary alloys are obtained. Effect of grain refinement and strain rate is discussed.2.Deformation behavior during solidification of Cu-Sn alloys for lead frame uses.Deformation behavior during solidification and also high temperature range in solid of 2,5 and 8% Sn alloys are obtained.3.Deformation behavior during solidification of steelsStrain rate effect for deformation during solidification of carbon steels and Si content effect of stainless steels are obtained.4.In situ simulator for solidification and deformationA new simulator developed for controlling cooling rate of solidification and deforming high temperature are obtained.