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球状,且颗粒尺寸相对均匀；由图2可以看出,硼酸镁(Mg2B2O5)晶须呈短纤维状且表面相对光滑,晶须直径范围为0.5~1.5 μm,长度在10~80 μm左右,长径比为5~20左右不等. 表1 6061铝合金粉末的基本成分 Table 1 Nominal composition of the 6061 matrix alloy (mass fraction, %) 图1...力-应变曲线,图9所示为复合材料力学性能随挤压比的变化曲线.结合图8和9可知,随着挤压比的增加,复合材料的抗拉强度逐渐增大,挤压比为25:1时材料拉伸强度达到最佳,伸长率随挤压比的增加总体呈下降趋势；热挤压态Al合金及复合材料的力学性能及所测密度如表2所列.与同种工艺制备的挤压态6061铝合金和挤压比为9:1的复合材料相比,挤压比为25:1的复合材料的拉伸强度(UTS)分别提高了37%和25%；与......
文章编号:1004-0609(2009)11-1948-08 TiAl3对TiC粒子在铝基体中分布及α(Al)晶粒形核的影响 夏天东1, 2,丁万武1, 2,赵文军1, 2,王晓军1, 2,徐仰涛1, 2 (1. 兰州理工大学 甘肃省有色金属新材料省部共建国家重点实验室,兰州 730050； 2. 兰州理工大学 有色金属合金及加工教育部重点实验室,兰州 730050) 摘 要:研究TiC和TiAl3细化工业纯铝时TiAl3的存在对TiC在铝基体中分布及α(Al)晶粒形核的影响,分析Al-Ti-C晶粒细化机制.结果表明:TiC单独作为工业纯铝的晶粒细化剂时,大量TiC被α(Al)晶粒推向树枝晶的晶界处,从而限制了TiC的异质形核作用；当TiC和TiAl3共同作为晶粒细化剂时,在α(Al)晶粒内部出现了大量TiC粒子,大量的TiC粒子成为了α(Al)的结晶核心,并且在......
强Cu基或Al基复合材料是未来铜材或铝材方面最具潜力的发展方向之一.在本研究中,综述了近几年在CNTs增强Cu基和Al基复合材料研究方面取得的进展,论述CNTs的预处理,CNTs-金属复合粉末的制备,CNTs-金属复合块体材料的制备,界面结合机制以及CNTs的强化机理5个主要方面. 关键词:碳纳米管；Cu基复合材料；Al基复合材料；制备方法；增强机理 中图分类号:TB333 ....XU等[35]采用超临界流体条件下的苯溶剂热反应,以无水三氯化铁为催化剂,六氯乙烷为碳源,在铝粉中成功原位合成了非晶CNTs,其长度为0.2~5 μm,直径为10~50 nm,与Al基体具有较好的润湿性.王伟等[36]利用明胶使CNTs分散在硫酸铜溶液中,和葡萄糖在碱性条件下还原得到内嵌CNTs的氧化亚铜复合颗粒,再利用氢气将其还原成为内嵌CNTs的铜复合颗粒,复合颗粒粒径在几百纳米到几微米之间......
Trans. Nonferrous Met. Soc. China 25(2015) 3056-3063 Influences of electric-hydraulic chattering on backward extrusion process of 6061 aluminum alloy Xin-hua HU1,2, Zhi-heng WANG1 , Guan-jun BAO1... were performed on 6061 aluminum alloy billets at room temperature. The experimental results showed that 5.65% reduction in the extrusion load was attained if the die and ejector were vibrated......
Trans. Nonferrous Met. Soc. China 30(2020) 1267-1276 TLP bonding of Ti-6Al-4V to Al 2024 using thermal spray Babbitt alloy interlayer H. NAEIMIAN, M. A. MOFID Department of Petroleum, Mining... strength of the joint reaches the high value of 57 MPa obtained at larger bonding time of 60 min. Key words: transient liquid phase; Al 2024 alloy; Ti-6Al-4V alloy; thermal spray; shear strength 1......
a strong potential for the improvement of properties of existing alloys and also for the development of novel alloy systems with superior properties. The present paper reviews our Center''s activities in the development of high performance alloys by strip casting. Examples include (1) Al alloys, (2) wrought Mg alloys, and (3) bulk metallic glass (BMG) alloys. Key words:strip casting; 6061 Al alloy; AZ......
Influence of Concentrations of KOH and Na2SiO3 Electrolytes on the Electrochemical Behavior of Ceramic Coatings on 6061 Al Alloy Processed by Plasma Electrolytic OxidationArash Fattah-Alhosseini1,Mojtaba Vakili-Azghandi11. Department of Materials Engineering,Bu-Ali Sina University摘 要:In this study,ceramic coatings were deposited on 6061 Al alloy using......
6061铝合金和H13钢接触后特征点温度随时间的变化 Fig. 6 Change of characteristic point temperature with time after contact of 6061 alloy and H13 steel 3.3 初始温度对接触换热系数的影响 图7所示为在相同界面接触条件下温度对接触换热系数的影响.具体的试验条件是... coefficient of 6061 alloy and H13 steel at different average contact temperatures 3.4 表面粗糙度对接触换热系数的影响 表面粗糙度可以用来表征两固体接触表面的凹凸程度.在实际生产中,由于加工精度或制造误差等问题导致试样或模具表面粗糙度发生变化.本文研究假设铝合金试样表面粗糙度值Ra=4.14 μm为不变,接触载荷为2.5......
modified Rousselier model[J]. Journal of Materials Processing Technology, 2014, 214(10): 2134-2145. [14] 朱 浩, 芳娟齐, 张 洋. 剪应力状态下 6061 铝合金的力学性能及断裂行为[J]. 中国有色金属学报, 2015, 22(6): 1570-1576.ZHU Hao, QI Fang-juan, ZHANG Yang. Mechanical properties and fracture behavior of 6061 aluminum alloy under shear stress states[J]. The Chinese Journal of Nonferrous Metals, 2015, 22(6): 1570-1576. [15] 叶 拓, 王 冠, 姚再起, 李......
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