http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : ( Nimet Kardes ) (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
-
Hybrid Steel Sheet Trends for Automotive Stampings
Sever Nimet Kardes 한국자동차공학회 2021 International journal of automotive technology Vol.22 No.5
This study provides information on the hybrid steel sheets available for the use of carmakers. The automotive industry has been working on many different areas simultaneously to improve the performance of vehicles such as lightweighting, safety, clean energy resources, and noise-vibration-harshness (NVH). Steel is the dominant material for most vehicles. However, there are currently many alternative materials to steel such as aluminum, magnesium, titanium, plastics, carbon fiber, etc. Therefore, a lot of research has been done to keep steel as the material of choice for vehicles by the steel and material industries. Hybrid steel materials have been introduced to compete with these alternative materials. Hybrid steel materials are developed for light-weighting and/or acoustic insulation applications. They provide a good balance between cost and weight. In this study, the definition of hybrid steel materials is explained. Emerging and available products with their technical properties and possible applications are reviewed.
-
Investigation of Galling In Forming Galvanized Steel Sheet
( Taylan Altan ),( Nimet Kardes ),( Hyunok Kim ) 한국부식방식학회(구 한국부식학회) 2011 Corrosion Science and Technology Vol.10 No.1
The major purpose of the present study is to evaluate the performance of various galvanized (GI) or galvannealed (GA) mild steels and AHSS in stamping applications. Finite Element Analysis (FEA) of selected stamping operations was conducted to estimate the critical pressure boundary conditions that exist in practice. Using this information, laboratory tribotests, e.g. Twist Compression (TCT), Deep Drawing (DDT) and Strip Drawing (SDT) Tests, were developed to evaluate the performance of selected lubricants and die materials/coatings in forming galvanized steels of interest. The sheet materials investigated included mild steels and AHSS (e.g. DP600 GI/GA, DP780 GI/GA, TRIP780 GA and DP980 GI/GA). Experimental results showed that galvanized material resulted in more galling, while galvannealed material showed more powdering and flaking. The surface roughness and chemical composition of galvanized sheet materials affected the severity of galling under the same testing conditions, i.e. lubricants and die materials/coatings. The results of this study helped to determine the critical interface pressure that initiates lubricant failure and galling in stamping selected galvanized sheet materials. Thus, to prevent or postpone the critical interface conditions, the results of this study can be used to select the optimum combination of galvanized sheet, die material, die coating and lubricant for forming structural automotive components.
ScienceON
KISS연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
