Effects of Cold Rolled Al-4Ti-1B Modifier on Microstructure and Mechanical Properties of ZL205A Alloy
The effects of cold rolling on the size and morphology of TiAl3 and TiB2 phases in Al-4Ti-1B Waffle block modifier and their effects on the microstructure and mechanical properties of ZL205A alloy were studied.The results show that cold rolling can break the rod-like TiAl3 phase in the Al-4Ti-1B modifier into blocks,resulting in a decrease in the size of the TiAl3 phase and a significant increase in the number.Compared with the grain refinement of ZL205A alloy by the non-cold-rolled Al-4Ti-1B Waffle block modifier,the cold-rolled Al-4Ti-1B Waffle block modifier with the addition of one-third reduced realizes a comparable grain refinement effect.Compared with the grain refinement of ZL205A alloy by uncold rolled Al-4Ti-1B Waffle block modifier,the amount of cold-rolled Al-4Ti-1B Waffle block modifier reduced by 1/3 can achieve the corresponding grain refinement effect.After T6 heat treatment,the plasticity of the cold-rolled Al-4Ti-1B Waffle block modified alloy reduced by 1/3 is 4%higher than that of the non-cold-rolled Waffle block modified alloy,but its tensile strength is reduced by 5 MPa.The decrease of its strength can be attributed to the decrease of the number and the increase of the size of the Al2Cu strengthening phase caused by the decrease of the number of Ti atoms dissolved in the matrix.
NETL
NSTL
万方数据
