Effects of annealing temperature on the microstructure and mechanical properties of Ni/Cu explosive composite plates
CHEN Huijie1, LI Huizhong1,2,3, LIANG Xiaopeng1,2,3, LU Yuchen1, ZENG Zhiheng4
1. School of Materials Science and Engineering, Central South University, Changsha 410083, China; 2. State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China; 3. Key Laboratory of Nonferrous Metal Materials Science and Engineering, Ministry of Education,Central South University, Changsha 410083, China; 4. Hunan Phohom New Material Technology Co., Ltd., Changsha 410083, China
Abstract：Ni/Cu laminated composite plates were fabricated by explosive welding. The effects of annealing temperature on the microstructure and mechanical properties of Ni/Cu composite plates were studied by optical microscope, scanning electron microscope, electron probe, and energy spectrometer, as well as tensile, shear, and hardness tests. The results show that with the increase of annealing temperature, the grain size of Ni and Cu matrix on both sides of the interface of the composite plate increases, and the thickness of the interface element diffusion layer increases. When the annealing temperature is 600 ℃, the thickness of the element diffusion layer reaches 5.82 μm. The hardness distribution of the composite plate after annealing at 200 ℃ has little change compared with that of the explosive state. When the annealing temperatures are 400 ℃ and 600 ℃, the hardness (HV1) at the interface are 65.1 and 66.1, respectively, which are significantly lower than that in the explosive state (160.2). The tensile strength of the composite plates in explosive state and after annealing at 200, 400, and 600 ℃ are 351.6, 305.9, 281.7, and 284.8 MPa, respectively, with elongation of 2.6%, 7.8%, 39.1%, and 39.4%.When the annealing temperature is 400 ℃, the shear strength of the composite plate reaches the maximum value of 191.3 MPa, which is 17.5 MPa higher than that of the explosive state.
陈慧杰, 李慧中, 梁霄鹏, 陆雨晨, 曾智恒. 退火温度对镍/铜爆炸复合板微观组织与力学性能的影响[J]. 粉末冶金材料科学与工程, 2023, 28(5): 465-472.
CHEN Huijie, LI Huizhong, LIANG Xiaopeng, LU Yuchen, ZENG Zhiheng. Effects of annealing temperature on the microstructure and mechanical properties of Ni/Cu explosive composite plates. Materials Science and Engineering of Powder Metallurgy, 2023, 28(5): 465-472.
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