深冷处理对叠层穿刺C_(f)/Al基复合材料组织特征和拉伸性能的影响  

Effect of cryogenic treatment on microstructure characteristics and tensile properties of laminated punctured C_(f)/Al composites

作　　者：梁祥 高翔 李云龙 徐志锋[3] 张正 闫利青 余欢[3] Liang Xiang;Gao Xiang;Li Yunlong;Xu Zhifeng;Zhang Zheng;Yan Liqing;Yu Huan(Jiangxi Advanced Composite Material Research and Development Center,Nanchang Jiangxi 330000,China;Jiangxi Hongdu Aviation Industry Co.,Ltd.,Nanchang Jiangxi 330096,China;School of Aeronautical Manufacturing Engineering,Nanchang Hangkong University,Nanchang Jiangxi 330063,China)

机构地区：[1]江西先进复合材料研发中心,江西南昌330000 [2]江西洪都航空工业集团有限责任公司,江西南昌330096 [3]南昌航空大学航空制造工程学院,江西南昌330063

出　　处：《金属热处理》2024年第5期74-80,共7页Heat Treatment of Metals

摘　　要：以M40J-6K叠层穿刺结构碳纤维为增强体,ZL301合金为基体,采用真空气压浸渗法制备叠层穿刺C_(f)/Al基复合材料,研究单次深冷处理时间(6、12和48 h)、循环深冷处理次数(1、3和9次)对复合材料拉伸性能和组织特征的影响,并对拉伸性能提高的原因进行了分析。结果表明,深冷处理可以提高叠层穿刺C_(f)/Al基复合材料的拉伸性能,改善组织特征。单次深冷处理可以提高复合材料的抗拉强度,而对拉伸模量的影响较小,抗拉强度以深冷处理6 h时提高幅度最大,较无深冷处理下的559 MPa提高至664 MPa,提高了18.8%;当延长处理时间至12和48 h时,抗拉强度基本趋于稳定。与单次深冷处理相比,循环深冷可以进一步提高叠层穿刺C_(f)/Al基复合材料的抗拉强度和拉伸模量,3次循环深冷处理后的抗拉强度和弹性模量,较单次深冷下的676 MPa、125 GPa分别提高至706 MPa、138 GPa,分别提高了4.4%、10.4%;当继续增加深冷循环至9次时,抗拉强度和拉伸模量趋于稳定。深冷处理后叠层穿刺C_(f)/Al基复合材料应力释放及状态的改变、致密度提高、晶粒择优取向、基体位错密度增高是影响复合材料宏观拉伸性能的主要原因。Using M40J-6K laminated punctured structure carbon fiber as reinforcement and ZL301 alloy as matrix,a laminated punctured C_(f)/Al composite was prepared by vacuum pressure infiltration method.The effects of single cryogenic treatment time(6,12,48 h)and cryogenic treatment cycles(1,3,9)on microstructure and tensile properties of the composites were studied,and the reasons for the improvement of tensile properties were analyzed.The results indicate that cryogenic treatment can improve the tensile properties and microstructure of the laminated punctured C_(f)/Al composites.Cryogenic treatment for 1 cycle can improve the tensile strength of the composites,while the impact on tensile modulus is relatively small.The maximum increase in tensile strength is achieved when the cryogenic time is 6 h,which increases from 559 MPa(without cryogenic treatment)to 664 MPa,by an increase of 18.8%.When the treatment time is further extended to 12 and 48 h,the effect is not significant.Compared with 1 cycle cryogenic treatment,cyclic cryogenic treatment can further improve the tensile strength and modulus of the laminated punctured C_(f)/Al composites.After 3 cycles of cryogenic treatment,the tensile strength and elastic modulus increase to 706 MPa and 138 GPa,respectively,compared to 676 MPa and 125 GPa under cryogenic treatment for 1 cycle,by an increase of 4.4%and 10.4%,respectively.When cryogenic treatment further increases to 9 cycles,the tensile strength and modulus are stabilized.The stress release and state change,increased density,preferred grain orientation,and increased matrix dislocation density after cryogenic treatment are the reasons that affect the improvement of macroscopic tensile properties of the laminated punctured C_(f)/Al composites.

关 键 词：深冷处理 叠层穿刺C_(f)/Al基复合材料 拉伸性能 组织特征 

分 类 号：TG333[金属学及工艺—金属压力加工]