Gammalloys Materials-Processes-Application Technology: Successes, Limitations and Future
2016-06-16 16:43   审核人:

报告题目:Gammalloys Materials-Processes-Application Technology: Successes, Limitations and Future

内容摘要:Recent applications of gamma alloys for aero-engine LPT blades at intermediate service temperatures (up to 750°C) and automotive turbocharger wheels at higher (metal) temperatures (800-950°C) establish a foundation of gamma alloy materials-processes-manufacturing technology.  Despite these exciting developments and their sustained expansion, the temperature capability and property balance of current alloys for the aero-engine blades has remained unchanged for the last 10-25 years.  The service temperatures for the automotive components have been slowly raised for the last 15 years through compositional adjustments, however, at the expense of the producibility and reliability, which has slowed wide-ranging adoption.

If the above history is any guide, the gamma alloy materials technology will remain in the same level indefinitely unless we rightly change our current R&D practices.  The changes can be effectively accomplished through the three steps: (1) correct understanding of current gamma alloy materials-processes technologies and realization of their limitations; (2) formation of the critical data, knowledge and information (DKI) base needed for the development of useful alloy-materials-processes-microstructure forms; and  (3) utilizing the application-specific RD processes (designing an application-specific alloy-microstructure form by integrating selected DKI and formulation of pertinent processing paths (wrought vs. casting), followed by validation experiments and refining processes).

The future of gamma alloy materials and processes technologies depends on how quickly we help redirect our RD practices to be target-oriented and go through the above three steps to realize the composition-processing-microstructure combinations that will satisfy the greater temperature or performance requirements for specific components or systems.

报告人:Dr. Young-Won Kim,  ASM Fellow

主持人:宋霖 副教授

报告地点:公字楼328

报告时间:6月21日 15:30

报告人简介

Young-Won Kim博士在金属间化合物、工具钢硬化、高温合金蠕变、粉末冶金工艺、复合材料制备领域取得了突出成绩,特别在TiAl基合金应用研究方面做出了杰出贡献,是TiAl基合金研究的奠基人和最杰出的学者。自1989年以来他在该领域发表的十几篇论文被SCI收录期刊被引2000余次,其中有3篇论文引用分别达300余次,单篇引用最高达400余次。Young-Won Kim博士共发表论文130余篇,国际会议特邀报告80余次,任分会主席15次,大会主席6次。获得发明专利9项,曾先后荣获美国材料、金属、矿冶学会“杰出科学家”奖(TMS Outstanding Scientist)、美国金属学会成就奖(ASM Fellow)、美国《冶金汇刊》杂志“最佳审稿人”奖。

 

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