Seminar & Colloquium
[세미나: 3월 15일(수), 오후 2시] Prof. Ke Wei, Nanchang Hangkong University (NCHU)
TITLE
Macro and micro deformation characteristics of isothermal local loading forming for large-scale titanium alloy rib-web components
SPEAKER
Prof. Ke Wei, Associate professor, School of Aeronautical Manufacturing Engineering, Nanchang Hangkong University (NCHU)
EDUCATION
- 2003.9 - 2007.06 Bachelor of Engineering, Nanchang Hangkong University
- 2009.9 - 2012.06 Master of Engineering, Nanchang Hangkong University
- 2013.3 - 2018.12 Doctor of Engineering, Northwestern Polytechnical University
PROFESSIONAL EXPERIENCE
- 2007.8 - 2009.08 Product Development Engineer, Jiangling LEAR Interior System Co. Ltd
- 2018.12- current Assistant/Associate Professor, Nanchang Hangkong University
| Date | Wednesday, March 15th, 2023
| Time | 14:00 ~
| Venue | 온라인 줌 https://snu-ac-kr.zoom.us/j/97960378205?pwd=NUlieTVVZG94QnNsQTZ2OEd0YVZaQT09
회의 ID: 979 6037 8205
암호: 318952
[Abstract]
The large-scale rib-web components of titanium alloy are more and more widely used in aerospace field (such as bulkhead). But it is difficult to form due to the ultra-large size, complex shape and hard-to-deform properties of titanium alloy. Isothermal local loading forming (ILLF) is a less-loading and flexible forging technology, which is promising to form these components by adopting relatively small-scale tonnage press. However, the material in loading region can transfer into the unloading region in transitional region under the alternation of the multi-die loading and multi-zone deformation, which may resulting underfilling and folding to be produced as well as complex microstructure evolution to be generated. To this end, identifying the macro-micro deformation characteristics and avoiding the forming defects during ILLF have great significance for realizing integrated less-loading forming of shape and performance for large-scale titanium alloy rib-web components. Firstly, the trans-regional material flow behavior, distribution characteristics of strain field and displacement field are elaborated. Secondly, the distribution of primary equiaxial α-phase recrystallization and its grain size in different loading region are predicted. Subsequently, the underlying reasons and improvement measures of the forming defects are given. Finally, the problems and challenges by ILLF are prospected.
| Host | 이명규 교수(02-880-1711)