共搜索到13619条信息，每页显示10条信息，共1362页。用时：0小时0分0秒576毫秒
文章编号:1004-0609(2008)05-0897-06 高应变速率下Al-Mg-Sc合金压缩变形的流变方程 鲁世红,何 宁 (南京航空航天大学 机电学院,南京210016) 摘 要:对Al-Mg-Sc材料进行静态力学性能实验,采用微型SHPB(Split Hopkinson pressure bar)实验装置对Al-Mg-Sc材料在应变率为103~104范围内进行动态力学行为测试.结果表明:Mg-Sc合金材料随应变率的提高,真实应力-应变曲线略有升高,表明Al-Mg-Sc材料不是一种对应变率敏感的材料；随着应变率的升高,材料发生的应变增大,表现出在高应变率下具有明显的应变强化效应.通过分析,选用较为合理的Johnson-Cook本构模型来构建Al-Mg-Sc合金高应变速率流变方程.根据遗传算法确定J-C方程中的参数.拟合值与实验值较吻合,证明经......
formability for magnesium alloys. Recent results indicate that Sr additions such as Al-Sr master alloys that have been widely used in industrial practice especially for the modification of Al-Si alloys, were thought as an effective means of grain refinement for Mg-Al series alloys[5-7]. For example, SRINIVASAN et al[8] and NAM et al[9] reported that adding Al-10Sr master alloy to a Si-containing......
% addition of Al5Ti1B. References [1] LIU Yan-hui, LIU Xiang-fa, LI Ting-bin, BIAN Xiu-fang, ZHANG Jun-yan. Grain refining effect of Al-Ti-C master alloy on Mg-Al alloys [J]. The Chinese Journal... based alloys [J]. Acta Materialia, 2005, 53: 3261-3270. [12] HAN Guang, LIU Xiang-fa, DING Hai-min. Grain refinement of Mg-Al based alloys by a new Al-C master alloy [J]. Journal of Alloys and Compounds......
Effects of various Mg-Sr master alloys on microstructural refinement of ZK60 magnesium alloy CHENG Ren-ju(程仁菊)1, PAN Fu-sheng(潘复生)1, 2, YANG Ming-bo(杨明波)3, TANG Ai-tao(汤爱涛)1 1...; Abstract: The effects of various Mg-Sr master alloys......
addition of Ti is believed to increase the grain refinement efficiency of Al4C3-containing Al-Ti-C master alloys in AZ31 alloy. Key words: Mg-Al based alloys; grain refinement; Al-Ti-C master alloys; Al4C3..., it is deduced that the size of Al4C3 particles in the Al4C3-containing Al-Ti-C master alloys is a key point for their grain refinement on Mg-Al based alloys, and the addition of Ti plays an important role......
......
......
alloys and it’s processes[M]. Changsha: Central South University Press, 2005: 292. [2] Filatov Y A, Yelagin V I, Zakharov V V. New Al-Mg-Sc alloys[J]. Materials Science and Engineering A, 2000, A280...由穿晶断裂逐步向沿晶断裂转变；在400 ℃以上拉伸,断口基本上是沿晶断裂.在400 ℃以上变形,晶界区域有大量的强滑移带；在400 ℃以上晶内强度高于晶界强度,拉伸时变形优先在晶界区域发生,变形不均匀的结果导致铸坯热加工过程中开裂.Al-6Mg-0.4(Sc+Zr)合金铸坯的最佳热加工温度范围为350~400 ℃,在此条件下,合金的变形抗力较低,热塑性较好,又不出现热裂纹. 关键词:Al-Mg......
Influencing Factors of Preparation of Al-Mg-Sc Master Alloy张军,张宗华,张桂芳摘 要:Through the experiment, the reduced temperature, the containing scandium quantity... restoring anhydrous the chloride of scandium to prepare the Al-Mg-Sc master alloy. The best experimental technological conditions are that the master alloy can contains 8.0% of scandium while the restoring......
of fine-grain Al-Mg-Sc alloys produced by equal-channel angular pressing[J]. Materials Science and Engineering A, 2003, 349: 318-326. [8] 潘青林, 尹志民, 邹景霞, 陈显明, 张传福. 微量Sc在Al-Mg合金中的作用[J]. 金属学报, 2001, 37(7...文章编号:1004-0609(2010)09-1686-06 热处理工艺对单辊搅拌冷却成形Al-Mg-Sc合金 组织和力学性能的影响 张雪飞1, 周天国1, 温景林2 (1. 沈阳大学 机械工程学院, 沈阳 110044；2. 东北大学 材料与冶金学院,沈阳 110004) 摘 要:采用单辊搅拌冷却技术(Shearing-cooling-rolling,简称SCR技术)和在......
