발간논문

Home > KJMM 논문 > 발간논문

Vol.30, No.4, 417 ~ 424, 1992
Title
Anisotropic Mechanical Properties in an 8090 Al - Li Alloy (1) ( Microstructure and Mechanical Properties )
손기선Ki Sun Sohn, 이성학Sung Hak Lee, 김낙준Nack J . Kim, 이종권Chong Kwon Lee
Abstract
The main objective of the present paper is to study on the structure and property relations of an 8090 Al-Li alloy. Particular emphasis has been placed on clarifying the origin of the anisotropy of mechanical properties which occurs along the short-transverse (S-T) direction. Although the application of stretching generally improved overall tensile properties of the 8090 plate due to the enhanced precipitation of S` phase, S-T oriented specimen in peak-aged condition showed an elongation ductility of only 1%, limiting the applicapability of the 8090 plate. For the S-T oriented specimen, examination of the fracture surfaces reveals clearly an intergranular fracture mode without any evidence of ductile fracture. Thus, fractorgaphic observation in the S-T oriented 8090 plate shows that the presence of coarse second phase particles at grain boundaries and the elongated shape of grain structure strongly influence fracture initiation process, thereby drastically reducing mechanical properties of the S-T oriented specimen.
Key Words
| PDF
대한금속∙재료학회 │ (06633) 서울시 서초구 서초대로 56길 38 대한금속∙재료학회 회관 (서초1동 1666-12번지)
Tel : 070-4266-1646 │ FAX : 02-557-1080 │ E-mail : metal@kim.or.kr
Copyright ⓒ 2013 사단법인 대한금속∙재료학회 All rights reserved.