退火(玻璃)
材料科学
再结晶(地质)
电子背散射衍射
扫描电子显微镜
粒度
微观结构
合金
晶界
极限抗拉强度
冶金
透射电子显微镜
动态再结晶
复合材料
热加工
纳米技术
生物
古生物学
作者
He Kehang,Zixin Yang,Shengli Guo,Baohong Zhu,Haochen Qiu,Shuaishuai Wu,Xuehui Yan,Wei Jiang
标识
DOI:10.1088/2053-1591/ad3a3b
摘要
Abstract The effects of annealing temperature on the recrystallization and grain boundary distribution characteristic for the drawn microtube of GH4169 alloy were studied by scanning electron microscope (SEM) equipped with an electron backscatter diffraction (EBSD) analysis system and transmission electron microscopy (TEM). The results demonstrated that at an annealing temperature of 850 °C, only a small proportion of recrystallization for the microtube underwent. As the annealing temperature increased, the proportion of recrystallization also increased. Specifically, at 900 °C, the proportion reached 95.8%, indicating complete recrystallization. Fine recrystallization grains were obtained with an average grain size of 4.73 μ m. As the annealing temperature is above 900 °C, the microtube also undergo complete recrystallization, and the grains grow up gradually. At 1000 °C, the average grain size grows to 7.42 μ m. The results also revealed that with the annealing temperature increasing, the proportion of Σ 3 grain boundary of the microtube was rising. The proportion of Σ 3 grain boundary increased from 30.1% to 34.2% with the annealing temperature increased from 900 °C to 1000 °C. Moreover, as the annealing temperature increased from 850 °C to 1000 °C, the room temperature tensile strength of the tube decreased from 1323 MPa to 965 MPa, the yield strength decreased from 1054 MPa to 523 MPa, and the fracture elongation increased from 10.2% to 31.2%.
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