CAJ | 학술논문

系统研究热加工过程对Al?Mg?Si?Cu合金组织、织构及力学性能的影响。通过工艺优化获得了力学性能各向异性很弱的合金板材。热轧和冷轧板材的显微组织均呈拉长态组织。热轧板表层的织构组分以 H {001}?110?和 E {111}?110?为主，而1/4层和中间层的织构以β取向线为主。与热轧板相比，一次冷轧板的β取向线密度增加而表层的H取向减弱。经中间退火后，形变织构基本消失，最终冷轧后的织构以β取向线为主。随着厚度的减小，织构梯度逐渐变弱。合金板材固溶处理后的再结晶织构组分仅含有cubeND{001}?310?织构。此外，分析了热加工过程、显微组织、织构以及力学性能之间的关系。
계통연구열가공과정대Al?Mg?Si?Cu합금조직、직구급역학성능적영향。통과공예우화획득료역학성능각향이성흔약적합금판재。열알화랭알판재적현미조직균정랍장태조직。열알판표층적직구조분이 H {001}?110?화 E {111}?110?위주，이1/4층화중간층적직구이β취향선위주。여열알판상비，일차랭알판적β취향선밀도증가이표층적H취향감약。경중간퇴화후，형변직구기본소실，최종랭알후적직구이β취향선위주。수착후도적감소，직구제도축점변약。합금판재고용처리후적재결정직구조분부함유cubeND{001}?310?직구。차외，분석료열가공과정、현미조직、직구이급역학성능지간적관계。
Influence of thermomechanical processing on the microstructure, texture evolution and mechanical properties of Al?Mg?Si?Cu alloy sheets was studied systematically. The quite weak mechanical properties anisotropy was obtained in the alloy sheet through thermomechanical processing optimizing. The highly elongated microstructure is the main structure for the hot or cold-rolled alloy sheets. H {001}?110? and E {111}?110? are the main texture components in the surface layer of hot-rolled sheet, whileβ-fibre is dominant in quarter and center layers. Compared with the hot-rolled sheet, the intensities ofβ-fibre components are higher after the first cold rolling, but H {001}?110? component in the surface layer decreases greatly. Almost no deformation texture can be observed after intermediate annealing. Andβ-fibre becomes the main texture again after the final cold rolling. With the reduction of the thickness, the through-thickness texture gradients become much weaker. The through-thickness recrystallization texture in the solution treated sample only has cubeND{001}?310? component. The relationship among thermomechanical processing, microstructure, texture and mechanical properties was analyzed.