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, Changsha 410083, China) Abstract: The Al alloy matrix composites reinforced by 50% silicon (mass fraction) with various amounts of Cu (0-6%, mass fraction) were prepared by hot pressing. The effect of Cu...,缩孔等问题[10].熔渗法难以获得具有一定强度和孔径的骨架,且由于Al液不能完全浸透骨架,导致材料难以完全致密化.喷射沉积法制备的坯件无宏观偏析,显微组织细小均匀,但制备工艺复杂且设备要求较高.由于沉积锭坯存在一定的孔隙度,必须经过后续加工来提高其致密度.传统的粉末冶金法是将一定比例的铝粉和硅粉以及粘结剂均匀混合,先压制成型再置于保护气氛下烧结致密化,要求硅含量不能太高,且存在粉末易氧化和材料不够......
Abstract: To predict hot tearing susceptibility (HTS) during solidification and improve the quality of Al alloy castings, constitutive equations for AA6111 alloys were developed using a direct finite element... for fabricating large ingots or billets of Al alloys since the 1930s [1]. With the demands for light- weight and energy-saving of vehicles, 6xxx Al alloy is increasingly used in cars [2,3]. Due......
of Materials Science, 2000, 35: 179-189. [15] ANDERSEN S J, MARIOARA C D, FR?SETH A G, VISSERS R, ZANDBERGEN H W. Crystal structure of the orthorhombic U2-Al4Mg4Si4 precipitate in the Al-Mg-Si alloy... alloy 6061[J]. Scripta Metallurgica, 1984, 18(12): 1347-1350. [17] JACOBS M H. The structure of the metastable precipitates formed during ageing of an Al-Mg-Si alloy[J]. Philosophical Magazine, 1972......
焊实验在自行设计制作的焊接设备上进行. 实验用搅拌头的轴肩直径为30mm; 搅棒直径为10mm, 搅棒长度略小于板的厚度. 焊接方式为单道对接拼焊. 焊接前, 将两块待焊铝合金厚板刚性固定在钢垫板上. 表1 7A52铝合金的主要化学成分 Table 1 Main chemical compositions of 7A52 Al alloy(mass fraction..., mechanical property and stress corrosion cracking of Al-Zn-Mg aluminum alloy[J]. The Chinese Journal of Nonferrous Metals, 2005, 15(5): 727-733. [10]CHEN Kang-hua, HUANG Lan-ping. Strengthening......
for the saw-tooth chip with more hydrogen content. Key words: Ti-6Al-4V alloy; hydrogen treatment; chip formation; adiabatic shearing ...室温条件下,置氢钛合金的流动应力几乎均小于未置氢材料的,说明氢作为β稳定元素可以提高钛合金的高温塑性.氢的加入降低了Ti-6Al-4V合金的β相转变温度并提高其含量,而β相 图3 应变速率为5 000 s-1时置氢TC4合金流动应力-应变曲线 Fig.3 σ―ε curves of hydrogenated Ti-6Al-4V alloy......
, 23(1): 35-37.ZHOU Yong-jun, WANG Rui-dan. Development and research status of Ni - base super alloy[J]. Journal of Shenyang Institute of Aeronautical Engineering, 2006, 23(1): 35-37. [3] 邵卫东, 严 彪, 毛彭龄...:钼合金；抗氧化；氧化机理；烧蚀行为 中图分类号:TG146.4 文献标志码:A Oxidation resistance and ablation behavior of refractory alloy at high temperature CHENG Hui-chao, FAN Jing-lian, LI Peng-fei......
channel angular extrusion processing parameters on the microstructure and mechanical properties of Mg–Al–Y–Zn alloy [J]. Materials and Design, 2011, 32: 575-583 [22] ZHAO Z D, CHEN Q, WANG Y B, SHU D Y... Mg-Al-Zn alloy into the semisolid state [J]. Scripta Materialia, 2004, 51: 405-410. 多向锻造制备ZK60镁合金部分重熔组织演变和力学性能 陶健全1,程远胜2,黄少东1,彭菲菲1,杨文选1,鲁美琪1,张志明1,金 鑫1 1. 中国兵器工业第五九研究所,重庆 400039； 2. 哈尔滨工业大学 材料科学与工程学院......
. On the influence of dispersoids on the particle stimulated nucleation of recrystallization in an Al-Fe-Si model alloy [J]. Materials Science Forum, 1998, 275: 483-488. [19] EVGENII A, KAWALLA R, VLADIMIR... deformed in creep [J]. Materials Transactions, JIM, 1997, 38(1): 37-42. [34] ROUMINA R, SINCLAIR C W. Recovery kinetics in the presence of precipitates: The softening response of an Al-Mg-Sc alloy [J......
Trans. Nonferrous Met. Soc. China 28(2018) 1563-1570 Effects of Sr incorporation on surface structure and corrosion resistance of hydroxyapatite coated Mg-4Zn alloy for biomedical applications Da... amount of hydrogen evolution among all coated samples. Key words: Mg-4Zn alloy; strontium-incorporated hydroxyapatite; electrochemical polarization; corrosion resistance 1 Introduction Magnesium (Mg......
; TG 113.25 文献标志码:A Heat treatment behavior of TA15 titanium alloy with different deformation degrees WANG Yu-hui, LI Yan, ZHANG Wang-feng, MA Ji-min (Beijing... of the recrystallization softening effect. Key words: TA15 titanium alloy; heat treatment; deformation degree; recrystallization; precipitation hardening TA15钛合金具有中等的室温强度,优良的高温性能和焊接性能,并可制成各种半成品,如棒材......
