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pISSN : 1598-706X / eISSN : 2288-8381


(논문)연구논문

한국주조공학회지 (12권1호 32-39)

A Study on the Fracture Characteristics of 7075 Aluminum Alloy

7075 Al 합금의 파괴특성에 관한 연구

Tai-Seoung Joung, In-Chan Kang

Inha University

Abstract

In this study, electron microscopy, Fractography and J_{IC} test have been used to investigate the fracture behaviour in the scope of aging temperature which 7075 Al-alloy can have high strength. Conclusions obtained on this study are as followed. 1) When the 7075 Al-alloy was aged for 24hrs at 120℃, it's mechanical properties was excellent but fracture toughness decrement resulted from intergranular fracture was emerged. 2) The state of aged for 24hrs at 100℃, had the highest fracture toughess. 3) We could infer that intergranular fracture occurred because preferrential precpitated precipitates in the grain boundary growed in the form of colinear along the grain boundary.

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