Orientation Studies of α-Al(Fe,Mn)Si Dispersoids in 3xxx Al Alloys
Dispersoids are important in 3xxx Al alloys, influencing mechanical properties, texture and recrystallization. In this work α-Al (Fe,Mn)Si dispersoids have been studied after low temperature homogenisation. The common orientation relationship between dispersoids and Al matrix has been reported in earlier studies. Here a systematic study on the orientation relationship and its exceptions is presented. It is found that most of the dispersoids follow the common orientation relationship, [1-1 1] α //[1-1 1]Al , (5-2 -7 ) α //(0 1 1)Al . Here the dispersoids are semi coherent with the Aluminum matrix. Different morphologies and habit planes are possible. Deviations from the most commonly observed orientation relationships are presented and discussed, to underline the complexity of the phase and its relation to the matrix.
Knut Marthinsen, Bjørn Holmedal and Yanjun Li
A. M. F. Muggerud et al., "Orientation Studies of α-Al(Fe,Mn)Si Dispersoids in 3xxx Al Alloys", Materials Science Forum, Vols. 794-796, pp. 39-44, 2014