摘要
以爆炸复合制备的镁/铝复合板材为研究对象,研究了退火处理工艺对复合板组织及力学性能的影响。采用电子万能试验机测试了复合板的力学性能,采用奥林巴斯GX51型金相显微镜和JSM-6510A扫描电子显微镜对复合板的显微组织进行了表征。结果表明:退火处理后,复合板的抗拉强度及硬度均降低,伸长率比原始试样的高。退火保温时间越长、温度越高,镁/铝复合板材的抗拉强度越低、伸长率越高、塑性越好。复合板材断口形貌表明,退火处理后铝侧韧窝增多,镁侧断口处的微裂纹消失,出现少量韧窝。退火处理改变了镁、铝两侧结合界面处过渡层的断裂方式,铝侧附近的过渡层出现大量撕裂脊,以韧性为主间有少量脆性断裂;镁侧附近的过渡层出现大量的解理面伴有少量韧窝,以脆性断裂为主间有韧性断裂。
The effects of annealing treatment process on the microstructure and mechanical properties of Mg/Al composite plates were studied.The mechanical properties of the composite plates were tested by electronic universal testing machine.The microstructure of the composite plates was characterized by Olympus GX51 metallographic microscope and JSM-6510A scanning electron microscope.The results show that the tensile strength and hardness of the composite plates decrease after annealing,and the elongation is higher than that of the original sample.The longer the annealing time,the higher the temperature,the lower the tensile strength,the higher the elongation and the better the plasticity of the magnesium/aluminum composite plates.The fracture morphologies of the composite plates show that the aluminum dimples increase after annealing treatment,the microcracks at the fracture surface of magnesium side disappear,and a few dimples appear.The annealing treatment changes the fracture mode of the transition layer at the interface of magnesium and aluminum,and a large number of tearing ridges appear in the transition layer near the aluminum side,there are a few brittle fractures between the ductile.The transition layer near the magnesium side has a large number of cleavage planes with a small number of dimples,and the brittle fracture is the main ductile fracture.
作者
马誉
王栓强
雷航宇
雷晨庆
MA Yu;WANG Shuanqiang;LEI Hangyu;LEI Chenqing(School of Materials Engineering,Xi'an Aeronautics University,Xi'an 710077,China)
出处
《热加工工艺》
北大核心
2024年第16期53-55,61,共4页
Hot Working Technology
基金
西安航空学院高等教育研究基金项目(2019GJ1001)
西安航空学院校级科研项目(2019HX013)
陕西省大学生创新训练项目(S201911736004)。
关键词
镁/铝复合板材
力学性能
退火工艺
magnesium/aluminum composite plate
mechanical properties
annealing process
