中国有色金属学报
中國有色金屬學報
중국유색금속학보
THE CHINESE JOURNAL OF NONFERROUS METALS
2014年
9期
2243-2249
,共7页
陈慧琴%柏金鑫%路瑞龙%林金保
陳慧琴%柏金鑫%路瑞龍%林金保
진혜금%백금흠%로서룡%림금보
Al-Zn-Mg-Cu超高强铝合金%轴对称热压缩%动态回复%动态再结晶%微观组织%织构
Al-Zn-Mg-Cu超高彊鋁閤金%軸對稱熱壓縮%動態迴複%動態再結晶%微觀組織%織構
Al-Zn-Mg-Cu초고강려합금%축대칭열압축%동태회복%동태재결정%미관조직%직구
Al-Zn-Mg-Cu ultra-strength aluminum alloy%axisymmetric hot compression%dynamic recovery%dynamic recrystallization%microstructure%texture
采用热力模拟实验和电子背散射衍射(EBSD)等测试方法，研究温度为350、420℃和应变速率为0.1 s-1条件下新型Al-Zn-Mg-Cu超高强铝合金轴对称热压缩变形以及400℃、1 h退火微观组织和织构的演变。结果表明：在350℃条件下进行80%的压缩变形过程中微观组织的演变机理是动态回复和大应变几何动态再结晶；主要织构是沿着α取向线分布的黄铜织构{110}?112?和少量的Goss{110}?001?织构；退火过程中发生静态回复和程度较小的静态再结晶，出现旋转立方织构{100}?011?，黄铜织构Brass {110}?112?沿着α取向线向Goss织构{110}?001?转变；420℃进行80%压缩变形的微观晶粒组织较均匀，细小的再结晶晶粒分布在变形剧烈的晶界或三角晶界处，织构类型为旋转立方织构{100}?011?；退火过程中发生亚动态再结晶和晶粒长大，该过程中旋转立方织构{100}?011?减弱，并出现黄铜织构{110}?112?。
採用熱力模擬實驗和電子揹散射衍射(EBSD)等測試方法，研究溫度為350、420℃和應變速率為0.1 s-1條件下新型Al-Zn-Mg-Cu超高彊鋁閤金軸對稱熱壓縮變形以及400℃、1 h退火微觀組織和織構的縯變。結果錶明：在350℃條件下進行80%的壓縮變形過程中微觀組織的縯變機理是動態迴複和大應變幾何動態再結晶；主要織構是沿著α取嚮線分佈的黃銅織構{110}?112?和少量的Goss{110}?001?織構；退火過程中髮生靜態迴複和程度較小的靜態再結晶，齣現鏇轉立方織構{100}?011?，黃銅織構Brass {110}?112?沿著α取嚮線嚮Goss織構{110}?001?轉變；420℃進行80%壓縮變形的微觀晶粒組織較均勻，細小的再結晶晶粒分佈在變形劇烈的晶界或三角晶界處，織構類型為鏇轉立方織構{100}?011?；退火過程中髮生亞動態再結晶和晶粒長大，該過程中鏇轉立方織構{100}?011?減弱，併齣現黃銅織構{110}?112?。
채용열력모의실험화전자배산사연사(EBSD)등측시방법，연구온도위350、420℃화응변속솔위0.1 s-1조건하신형Al-Zn-Mg-Cu초고강려합금축대칭열압축변형이급400℃、1 h퇴화미관조직화직구적연변。결과표명：재350℃조건하진행80%적압축변형과정중미관조직적연변궤리시동태회복화대응변궤하동태재결정；주요직구시연착α취향선분포적황동직구{110}?112?화소량적Goss{110}?001?직구；퇴화과정중발생정태회복화정도교소적정태재결정，출현선전립방직구{100}?011?，황동직구Brass {110}?112?연착α취향선향Goss직구{110}?001?전변；420℃진행80%압축변형적미관정립조직교균균，세소적재결정정립분포재변형극렬적정계혹삼각정계처，직구류형위선전립방직구{100}?011?；퇴화과정중발생아동태재결정화정립장대，해과정중선전립방직구{100}?011?감약，병출현황동직구{110}?112?。
The microstructure and texture evolution of new Al-Zn-Mg-Cu ultra-strength aluminum alloy during axisymmetric hot compression at temperatures of 350, 420 ℃and strain rate 0.1 s-1 and annealing at 400 ℃ for 1 h processes were studied by thermo-mechanical modeling experiments and EBSD testing method. The results show that the microstructure evolution mechanism during hot compression up to 80% reduction at 350 ℃ is dynamic recovery and large strain geometric dynamic recrystallization. Brass {110}?112? along the α-fiber and a little Goss {110}?001?dominate mainly during the deformation process. During the annealing process, static recovery and static recrystallization with small recrystallized fraction occur. Rotated cube {100}?011? appears and Brass {110}?112? transforms to Goss{110}?001? along α-fiber. When the reduction is up to 80% at 420 ℃, the refined homogeneous recrystallized grains locate at severe deformed grain boundaries or the triangle grain boundaries. Rotated cube{100}?011?appears during the deformation process. During the annealing process, meta dynamic recrystallization and grain growth dominate. Rotated cube{100}?011?decreases and Brass{110}?112?appears.
