An approach for Continuous Cooling Transformation (CCT) diagrams of aluminium alloys

被引：15

作者：

Herding, T ^{[1
]}

Kessler, O ^{[1
]}

Hoffmann, F ^{[1
]}

Mayr, P ^{[1
]}

机构：

[1] Fdn Inst Mat Sci, D-28359 Bremen, Germany

来源：

ALUMINUM ALLOYS 2002: THEIR PHYSICAL AND MECHANICAL PROPERTIES PTS 1-3 | 2002年 / 396-4卷

关键词：

heat treatment; age hardening; quenching; IT diagram; CCT diagram; DSC;

D O I：

10.4028/www.scientific.net/MSF.396-402.869

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Two different kinds of Time Temperature Transformation (TTT) diagrams are known. The first one are Isothermal Transformation (IT) diagrams and the second one Continuous Cooling Transformation (CCT) diagrams. These diagrams are important for the correct heat treatment of aluminium alloys, because they provide information about the required quenching rate, which is necessary to obtain a supersaturated solid solution during age hardening. Furthermore, it is possible to determine the lowest quenching rate, which permits both a high strength and a small distortion of the component after age hardening. In the literature IT diagrams for different aluminium alloys are available. To determine these diagrams, a solution annealing followed by quenching to defined temperatures is necessary. At these temperatures the alloy is kept isothermally until a transformation has started. These diagrams are not directly portable on continuous cooling, because of the different cooling paths.

引用

页码：869 / 874

页数：6