2018新材料国际发展趋势高层论坛

乔蒂马宗德

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职位/职称:

单位: 美国密歇根大学

报告论坛: 新材料产业与技术投资促进国际论坛

报告题目: Quality Assured Additive Manufacturing of Metallic Materials

简历:

乔蒂•马宗德,美国工程院院士。1978年获得英国伦敦帝国理工学院冶金工艺学博士学位。现任美国密歇根大学机械工程学院终身教授,激光辅助智能制造中心主任,美国国家科学基金会工业-大学联合研究中心项目(NSF IUCRC)密歇根大学主任。
研究领域包括通过激光将材料加工工程化、激光辅助制造工艺、原子应用,技术方法包括在线光学诊断、传输建模研究、特定属性材料的非平衡合成,以及评估和表征。曾在TMS及ICALEO等重要国际性会议作大会或特邀报告30余次,发表文章约400篇,出版专著两本,主编激光加工及机械工程领域著作10本,拥有美国专利17项。

摘要:

Recently Additive Manufacturing (AM) has been hailed as the “third industrial revolution” by Economist magazine [April-2012]. Precision of the product manufactured by AM largely depends on the on line process diagnostics and control. This paper describes paradigm-shifting approach for manufacturing Metallic alloy single crystal and polycrystalline components by Laser Based direct writing and sophisticated on-line diagnostics with close loop control to monitor and control the material properties of the parts during fabrication.  Our “Certify as you build” approach provide high level of reliability and robustness in manufacturing in general, thereby minimizing costly production downtime and rejection rate.
The monitored signal includes the surface thermal radiation and the plasma spectrum generated during the laser-material interaction.  Correlations have been developed successfully for in-situ detection of temperature, composition, defect and Phase transformation for both polycrystals and single crystal nickel-based super alloys. Due to the multitude of variables involved in the AM process, starting from process parameters to input materials, quality need to be interrogated continuously. Otherwise any defect in the single crystal growth would be accumulated and one will reach the point of no return, at the expense of valuable materials, labor and time. Defect accumulation is also a major problem for  Poly-crystalline materials. Therefore, in-situ defect and properties detection is critical to accompany materials fabrication. This in situ diagnostics has the potential to change the way laser processing is practices presently.

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重要日期

会议开始时间

2018-09-16

会议结束时间

2018-09-18

报到时间

2018-09-16

poster提交截止日期

2018-08-30

报告人摘要提交截止日期

2018-08-25

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