The resulting semi - solid mixture then flows homogeneously , figure 1 , behaving as a thixotropic fluid with viscosity depending on fraction solid , morphology , shear rate and time 这样最终形成的半固态混合物会均匀地流动（图表1 ） ，并依据固体粒度、晶形、剪切速率及时间而形成粘性触变液体。
6 . the melting of the grain boundary is the reason of the semi - solid grain globalization , and its control factors were the atomic diffusion velocity and the liquid - solid interface curvature 6 、半固态晶粒球状化的基本原因是晶界熔化，其控制因素是因液界面处原子扩散迁移的速度和界面曲率。
Fluxes and cover gases are currently used for the melting and production processes , and semi - solid thixocasting is also used to lower the operation temperature ; but there still remain many problems 目前一般采用熔剂覆盖法和气体保护法熔炼生产镁合金，或采用半固态射铸成形工艺以降低作业温度，但都存在着不少缺点。
4 . after continuously heated and isothermally soaked , the equiaxed grain , as the result of the recrystallization , was the necessary texture condition of the semi - solid grain ' s globalization processing 4 、连续升温和等温保温过程中再结晶形成等轴晶，为半固态晶粒球状化提供了必西安理工大学硕士学位论文要的组织条件
The microstructure , the hardness and the wear resistance properties of the composites fabricated by semi - solid casting has been studied and analyzed metallographic analysis indicated that sic particles dispersed uniformly in the composites 本文采用半固态复合铸造法制备了sic颗粒增强铝基复合材料，并对这一系列材料的微观组织、硬度及耐磨性能进行了研究与分析。
The research and development process of the technology were summarized and the craft , the slurry making method , the microstructure evolution of semi - solid formed iron and steel material as well as the prospect of the technology were imtroduced 本文综述了钢铁半固态成形技术的研究开发过程，介绍了钢铁半固态成形的工艺、浆料的制备方法、半固态金属的微观组织演变以及对这种成形工艺的展望。
Using the special stirring equipment and the optimized stirring processing , some semi - solid al matrix in - situ composites slurry with small size of al3fe reinforcement phase and even distribution of reinforcement particles in mixing melts are achieved 在专用搅拌设备与优化设计后的搅拌方案共同作用下，能获得具有细小的强化相，且强化相粒子在熔体中分布均匀的半固态铝基原位复合材料浆料。
Abstract : numerical simulation of semi - solid metal forming processes is reviewed and the features of the simulation is analyzed . the development and the trends of numerical simulation technology on semi - solid metal forming are discussed in details 文摘:本文在综合有关半固态金属加工过程模拟文献资料的基础上，简要分析了半固态金属加工过程模拟的特点，对数值模拟技术在半固态加工方面研究的发展、现状和趋势进行了详细的评述。
