共搜索到189条信息，每页显示10条信息，共19页。用时：0小时0分0秒545毫秒
16 MPa (4.0%),FSW接头相应值分别提高了 77 MPa (23.8%) 和 54 MPa (11.9%).Al-Zn-Mg-Sc-Zr 合金FSW接头的抗拉强度,伸长率和焊接系数分别达到了506 MPa,6.34%和91.0%,其焊接性能甚至优于近期报道的超高强Al-Zn-Mg-Cu合金FSW焊件的[41]. 不像其他超塑铝合金需要实施复杂而苛刻的超塑预处理工艺,新型Al-Zn-Mg...): 53-60. LIN Zhao-qi, MA Hong-sheng, ZHAO Gang. The development of Al-Sc alloy (Ⅱ)[J]. Light Metal, 1992(2): 53-60. [4] 戴晓元, 夏长清, 马 科, 刘 娟. Sc对Al-Zn-Mg-Cu-Zr合金铸态组织和力学性能的影响[J]. 中国有色金属学报, 2007......
deformation and processing map of a typical Al-Zn-Mg-Cu alloy[J]. Journal of Alloys and Compounds, 2013, 550: 438-445. [5] 张 毅, 李瑞卿, 许倩倩, 田保红, 刘 勇, 刘 平, 陈小红. Cu-Cr-Zr合金的高温热压缩变形行为[J]. 中国有色金属学报, 2014, 24(3... for novel Al-Zn-Mg-Cu alloy[J]. Transactions of Materials and Heat Treatment, 2011, 32(10): 39-42. [27] 韦莉莉, 潘清林, 周 坚, 贾 科, 尹志民. Al-Zn-Mg-Cu-Zr合金加工图的构建及失稳分析[J]. 中南大学学报(自然科学版), 2013, 44(5): 1798-1805. WEI Li......
DOI:10.19476/j.ysxb.1004.0609.2019.07.02 微量镱和过渡元素对Al-Zn-Mg-Cu超强合金晶界特征和性能的影响 方华婵,刘 滩,朱佳敏,肖 鹏 (中南大学 粉末冶金国家重点实验室,长沙 410083) 摘 要:通过电子背散射衍射实验对复合添加稀土元素Yb和过渡族元素Zr或Cr的Al-Zn-Mg-Cu超高强合金的晶粒尺寸,晶界类型,晶界特性进行研究,分析了微合金化后的晶界特性对合金力学性能和局部腐蚀(晶间腐蚀和剥落腐蚀)的影响.结果表明:与复合添加Yb和Cr相比,复合添加Yb和Zr的Al-Zn-Mg-Cu合金具有最佳的再结晶抑制效果；高温固溶-时效处理后,合金晶粒尺寸由40 μm显著细化到2.3 μm,再结晶程度从98%下降到3%,Σ27晶界所占比例大幅提高,小角度晶界所占比例由8%提高到51%；亚晶界上的析出相与......
on the high temperature super-plasticity, and the changes in strength of alloys at medium and high temperatures were scarcely reported. KUMAR et al [19] studied the superplastic behavior of Al-Zn-Mg-Cu-Zr... of Al-Zn-Mg-Cu aluminum alloy during hot deformation [J]. Materials Science and Engineering A, 2016, 662: 204-213. [19] KUMAR A, MUKHOPADHYAY A K, PRASAD K S. Superplastic behaviour of Al-Zn-Mg-Cu-Zr......
. Effects of Ti addition on the microstructure and mechanical properties of Al-Zn-Mg-Cu-Zr alloy [J]. Materials Science and Engineering A, 2021, 801: 140437. DOI: 10.1016/j.msea.2020.140437. [7] GUO Yue... of an ultrahigh strength Al-Zn-Mg-Cu-Zr-Sc (7055) alloy processed by modified powder hot extrusion with post aging [J]. Vacuum, 2019, 161: 434-442. DOI: 10.1016/j.vacuum.2019.01.013. [29] BALOG M, OROVCIK......
G M, Prasad K S, Varma V K, Mondal C. Microstructure property relationships in a high strength Al-Zn-Mg-Cu-Zr alloy[A]. Nie J F, Morton A J, Muddle B C. Proceedings of the 9th International.... After 22 h, the tensile strength changes little (approximate by at 590 MPa) for a relative long time. Key words: 7B04 aluminum alloy; ageing; precipitation; strengthening behavior Al-Zn-Mg-Cu系(7×××系......
, 31(10): 2503-2515. [7] DORWARD R C, BEENSEN D J. Grain structure and quench-rate effects on strength and toughness of AA7050 Al-Zn-Mg-Cu-Zr alloy [J]. Matallurgical Transaction A, 1995, 26(10...; 1 Introduction Al-Zn-Mg-Cu aluminum alloys are aging- hardenable......
金属元素(如Zr和Ti) 复合添加时效果更佳.Al-Zn-Mg系合金属于热处理可强化铝合金,具有优良的焊接性能,较好的耐腐蚀性能和较强的韧性等优点[2-3],被广泛应用于交通运输,建筑,航空航天,军事装备等领域.近年来,对超高强Al-Zn-Mg-Cu合金的组织性能研究较多,而对高强可焊结构材料Al-Zn-Mg的研究相对较少.据报道,在中强可焊结构材料Al-Zn-Mg合金中加入微量Sc和Zr能进一步... on the cracking resistance characteristics of Al-Zn-Mg-Cu-Zr wrought high-strength alloy[J]. Material Science Forum, 2002, 396-402(3): 1347-1352. [3] Mukhopadhyay A K, Reddy G M. Influence of trace addition of Ag......
J. Grain structure and quench-rate effects on strength and toughness of AA 7050 Al-Zn-Mg-Cu-Zr alloy plate[J]. Metallurgical and Materials Transactions, 1995, A26: 2481-2484. [4] Morere B, Ehrstrom J...撕裂断口形貌 Fig.3 Fracture surface of Kahn tear test of 7A55 alloys solutioned at different temperatures 从图3(a)可看出,其断裂方式为穿晶断裂和沿晶断裂的混合模式,断裂韧窝中含有许多未溶解的小粒子,经能谱分析测定粒子A处含Al,Cu,Zn和Mg元素,粒子B处含Fe和Cu元素.粒子B在微小的塑性变形......
effects on strength and toughness of AA7050 Al-Zn-Mg-Cu-Zr alloy plate[J]. Metallurgical and Materials Transactions A, 1995, 26(9): 2481-2484. [5] Deschamps A, Brechet Y. Influence of quench and heating...×××合金而言,缓冷淬火过程中,合金元素(Cu+Mg+Zn)的复合添加会导致平衡相的析出,增大合金的淬火敏感性[2-3]. b. 晶粒组织形态.再结晶组织及大角度晶界的出现会增大合金的淬火敏感性[4-6]. c. 微量元素的作用.微量Cr和Mn的添加可有效地抑制再结晶,细化晶粒,但合金的淬火敏感性大大增强.微量Zr的添加不仅可以起到上述作用,而且不会引起严重的淬火敏感性[7]. 现代航空航天工业......
