Study On Recrystallization Texture Of FCC Multi-alloy Sheet Under Large Reduction Rate

Compared with the pure metal or the binary alloy,the multi-alloy can obtain the combination of characteristics of high hardness,high work hardening,high toughness,high temperature softening resistance,high temperature oxidation resistance,corrosion resistance and high resistivity.Compared with pure alloy or binary alloy,its features are better than traditional alloys.Multi-alloys are mainly developed in two directions:the rapid development of and over quinary high entropy alloy in recent years;Based on the traditional binary alloys,the alloy elements of the development of ternary and ternary alloy high entropy alloy and the research of recrystallization texture of ternary alloy is not perfect,because recrystallization annealing easily forms the complex phase structure of high entropy phase and intermetallic compound,hindering the study of recrystallization nucleation and texture evolution.In addition,the high reduction rate of FCC metal sheet easy access to more sharp deformation and recrystallization texture,so simple reduction of the FCC structure of the high-entropy alloy and alloy annealed sheet organization and texture research.It is helpful to more accurately analyze the evolution of recrystallization texture of multi-alloy.In this studying,FCC structure Ni2CrFeMn2Cu and NiCrFeMnCo quinary high entropy alloy sheet with thickness of 0.12?0.26 mm and 0.10?0.30 mm NiCrCu ternary alloy sheet were prepared by hot rolling and rolling at a large reduction rate and annealing.EBSD,XRD and other means of analysis of its recrystallization structure and texture evolution of the study,the following results were obtained:(1)The single-phase Ni2CrFeMn2Cu sheet with a reduction of 94?96%has a slow grain growth during recrystallization annealing and a fine grain structure with a grain size of about 1?m can be obtained by annealing at 900?.The reason is that the uniform matrix of high-entropy alloy diffuses slowly and its grain boundary migrates slowly.After annealing at 1100?,it is still single-phase FCC structure,and strong Goss and S recrystallization texture are formed within the range of the reduction rate.And the reduction rate has little effect on the recrystallization texture.The formation mechanism of recrystallization texture is preferential nucleation and selective growth.The recrystallization rate of FCC single-phase NiCrFeMnCo sheet with 94%reduction of rolling reduction at 900? is faster than that of Ni2CrFeMn2Cu,and the fine grain structure with the grain size of about 3 ?m can be obtained.After the annealing at 1100?,a small amount of ?(Mn)phase appeared and the recrystallized texture was scattered,including Goss,Copper and deviated ?111}<1 12>texture components.(2)Large reduction rate FCC structure Ni2CrFeMn2Cu and NiCrFeMnCo pentagonal high-entropy alloy sheets and NiCrCu ternary alloy sheet recrystallization texture formation mechanisms are preferential nucleation and selective growth.(3)With a reduction of 98%and a high temperature annealing at 1100? a nearly single Cube orientation of 0.10 mm thick NiCr9Cu11 sheet was successfully obtained with Cube texture volume fraction of 96%.The effect of cold rolling reduction rate and annealing temperature on recrystallization texture of ternary NiCrCu alloy sheet is obvious.The reduction rate increases from 93%to 98%and the annealing temperature increases from 800? to above 1000?.Cube recrystallization texture can be significantly enhanced in NiCrCu alloy sheet.