View Full-text

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


(논문)연구논문

한국주조공학회지 (24권1호 45-51)

Effects of Fe and Si Additions on the Ageing Behaviors for High Strength Al-Cu-Mn-Ti-Zr-Cd Casting Alloys

Fe과 Si의 첨가가 주조용 고강도 Al-Cu-Mn-Ti-Zr-Cd 합금의 시효경화거동에 미치는 영향

Chul-Hyo Kim, Jung-Moo Lee*, Kyung-Hyun Kim*, In-Bae Kim

Pusan National University, *Korea Institute of Machinery & Materials

Abstract

Fe and Si are common impurity elements in the aluminum alloys. In this investigation, the effects of the addition of Fe and Si on the age-hardening behaviors of the Al-Cu-Mn-Ti-Zr~Cd casting alloys were examined through hardness measurements, calo- rimetric techniques and observation of the transmission electron microscopy. The addition of Fe depresses the formation of GPII and 9 2 and thus retards the peak aging time and reduces the peak hardness of the Al- Cu-Mn-Ti-Zr-Cd alloys. On the contrary, the addition of Si accelerates the formation of GPII and 9 i and thus accelerates age-hardening behaviors of the Al-Cu-Mn-Ti-Zr-Cd alloys.

Keywords

casting, Al-Cu-Mn-Ti-Zr-Cd, Fe, Si, ageing