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中南国际科研合作专项学术论坛

发布时间:2018-11-02    浏览次数:125

报告题目1New Technical Solutions in Metallurgy

报告题目2Development of Theory and Technology of the Process of Asymmetric Rolling as a Method of Severe Plastic Deformation

报告时间:2018117日下午2:50-5:00

报告地点:中南大学新校区机电工程学院C208会议室

报告人:Prof. Alexander PesinA/Prof. Denis PustovoitovNosov Magnitogorsk State Technical University

报告简介:

报告1There have been no breakthroughs in ferrous metallurgy for the last 80 years. Automation and digitalization arrived, while the actual steel making processes saw almost no changes. Today, almost all industries experience rapid changes. In 2018 we will see a launch of trains that can travel as fast as1,200 km/h. In 2022 we will see aircrafts capable of flying from London to New York in 1 hour. They already know how to grow human arms and legs. And driverless taxis have become extremely popular. Should we be expecting to see a major breakthrough in metallurgy any time soon? In this lecture you will learn about this and other problems, as well as possible ways to solve them

报告2Severe plastic deformation (SPD) is a very effective way to create ultrafine grain structures in metals and alloys. Nowadays many variants of SPD techniques are available. Asymmetric cold rolling, asymmetric cryorolling and asymmetric accumulative roll bonding are the processes, which can provide SPD. Since these processes are continuous, they have great potential for industrial production of large-scaled materials with ultrafine grain structure. Shear strain and accumulated strain plays a critical role in the grain refinement of the processed materials. It is well known that the mechanism of SPD during asymmetric rolling processes comes from its large accumulated strain, which is composed of compressive strain and additional shear strain. For better understanding of a maximum possible level of accumulated strain, generated during a single-pass asymmetric rolling, it is necessary to simulate different rolling modes. In this presentation, the influence of process parameters on shear strain and accumulated strain during asymmetric cold rolling, asymmetric cryorolling and asymmetric accumulative roll bonding is analysed by FEM and discussed. Special laboratory asymmetric rolling machine is presented.

报告人简介:

Alexander Pesin教授于1979-1984年获得金属加工工艺本科学位,1989年获得博士学位。自1983年至今在Nosov Magnitogorsk State Technical University工作,担任助教、讲师、副教授、教授。自1982年已经发表学术论文355篇,110个发明专利授权。

Pustovoitov Denis副教授于2010年获得金属加工工艺博士学位。自2010年至今在Nosov Magnitogorsk State Technical University工作,担任助教、讲师、副教授。自1982年已经发表学术论文41篇。

 

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201811月02