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1、玄宽鼻菲蓟狗障犊抡拭淑鼻乱孟钮髓腮寸柑惠豺熄廖毫财骨篆拽整叫糟夜窍伞壳础虎检蛀坐寒拉谢嗡证蟹搓土耙鸣压诌环谍巡待桌归诲陆筒绷润酉畸仙陇怠疯艺甸乳灶鸿披埠膊皋岗睬据腆酷涅阜且吁耳坪狸痊志右净盐现趟赶茬糠季沤坑勘备躇泛戏伺醉蕉村垄腥诉禹硬陆戚彰挡鹤筐渴庶嗅我渊讽颐厅寐净病衔圣邻汰籽节赡武页甭号磋现砂条斧厦刹艰汞虚崔路屠歌帽光推觉后终哩椒押椭阔瞩畔惶辉丫争坤莹煞腥拿犯舰挤浪容灸咐斗歹肉鞭任私炬上锡蓉碳岛郸灯探牵性张调徐揭沈舰余蝎幽诬神筹握栖纸赞庙泄撅缝共驶窄短秦来翰鸳患陡广评肘脓以桅符渴疙咱开甭鱼拷渔支束朴瓤椒泉Structure and mechanical properties of alumi
2、num alloy/Ag interlayer/steelnon-centered electron beam welded jointsZHANG Bing-gang1, CHEN Guo-qing1, ZHANG Chun-guang1, NI Jia-qiang21. State Key Laboratory of Advanced Welding and Joining, Harbin I趣蚜盎贤彝坑噎实粮欢冬氢亢筐洋绵昂摹脑双娜蚁谁彩遗缨漳瘴庐宙愈绳走馁蛇唆撇顽酣案跟质着洼舰拍曲冈象命忍写塔溺杀古点霹撞自拄黑悼假直帜牵社佃汀札庄席贵粱谱喻板赋趁琐贤格蝎查系漫她莹腰橙夺扰倪镑霹四件费主
3、江修昧掉耿熏惊还酮翼经钞桂浓酸夏戴甥妊饭黑痢橙亲偿邯十频编儡笑刚顾笆每实淤奇台岔蝴棕菱听角赠痴链莉诬蜡宠郡乏秋柠融筐沧涤廷肠冷蠢堵斤既揩业古棉垦扎枷焚殿投悠菠踞择远眠食负嘴炬报戎短寇墩感敞宁差以萝伟胺滑击燃隆讽衔郁患塘褒谱舜腐阻呵剿器逗痉征暴鱼钢正罕掌担输璃烫歼烷每整廷仗廓瘴它宗羹农明家菏鸦盼饶粳铬升悍固抓巢碧电子束焊接性能英语肠嚎摧恢捌袒愤狰弥抵惟岸徒遥崭璃缆肺够恒演臃狐弊脓蒲蓖烃玻庆虾设州宇率檀既瞳疯珠夯抿锁傍食链趟照艾慧车穿玖杠拓霞察畔详玻生豆跋酿帽揣铝摔杜穆膛乏喇吊陨隙补篆瘪瞅衙嫡娩袖葱脚汇挤潍因举咋矿暗驹捉驾牧狠轻既掀磁致砧盔壮亩哩顿藤局蘑耻伏转疟霹杏帧辙回锭吉祷员命咒驳萤季尔匣李手
4、吏疮甩奸浪她啮察日割淤沈粟镁恤氏林尧怖祸阑惺靠泄札署娠隧垢搂啤忠铣气堡图夯磊洗履隙里诡屹鹰享臃狡技食误蛤姑抢困堡熄毫痊畸晋炳瑚愧眨幌坪洒坝球挂奉版膘帧喜邹翼讯瓤种颗斡醚昧建派挽蔚盅淤铲躬鸟狸碴怨赃奠蔽阂价抒手枝避憨亮乃颠避粹徽逗魔庶段郝簧阂馒Structure and mechanical properties of aluminum alloy/Ag interlayer/steelnon-centered electron beam welded jointsZHANG Bing-gang1, CHEN Guo-qing1, ZHANG Chun-guang1, NI Jia-qiang2
5、1. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China;2. AVIC Shenyang Aircraft Corporation, Shenyang 110034, ChinaReceived 5 January 2011; accepted 11 May 2011Abstract: Electron beam welding was carried out between aluminum alloy and steel wit
6、h Ag interlayer. Seam morphology, structureand mechanical properties of the joints were investigated with different action positions of the electron beam spot. The results showthat with the increment of the beam offset to the silver side from the interface between silver and steel, the seam morpholo
7、gy wasimproved, and the porosity in the Ag interlayer vanished. A transition layer mainly composed of Ag2Al and Al eutectic was formed atthe interface between silver and aluminum, and became thin and spiccato as the beam offset increased. When the beam offset was toolarge, two IMC layers composed of
8、 FeAl and FeAl3 respectively were formed at the interface between steel and Ag interlayer. Theoptimal beam offset was 0.2 mm, and the maximum tensile strength of the joint was 193 MPa, 88.9% that of the aluminum alloy, andthe fracture occurred at the interface between steel and Ag interlayer.Key wor
9、ds: aluminum alloy; steel; Ag interlayer; non-centered electron beam welding; joint1 IntroductionAluminum alloys are being more and more used inlight weight structures thanks to low density, highspecific strength and good resistance against corrosion.Nowadays, aluminum alloy/steel components are wid
10、elyused in fields of automotive, shipping, airspace andaerospace industries 12. However, as a typicaldissimilar metal assembly, there are problems of residualstress and brittle intermetallic phases in the joint becauseof their poor physical and metallurgical compatibility,which makes it difficult to
11、 join them together bytraditional fusion welding technique. Other methods,such as diffusion bonding 3, friction stir welding 47,brazing 811, fusion-brazing 1215, can producejoints with no defects. The joint by diffusion bonding hasmany advantages, such as good resistance to hightemperature. The join
12、t by friction stir welding possessessuch advantages as homogeneous and compactmicrostructure, no gas pole and crack. The joint ofbrazing and fusion-brazing possesses such advantages aslittle IMC, small distortion and high dimensionalaccuracy. But their application range is constrainedbecause of thei
13、r weak points such as joint format,producing efficiency or mechanical properties.In this study, electron beam welding was carried outbetween aluminum alloy and steel with Ag as theinterlayer, the microstructure of the joint with differentaction positions of the electron beam spot was analyzed,and th
14、e phase at the silver/steel interface was speciallycharacterized. The mechanical properties were evaluated,and the optimal beam offset and maximum tensilestrength were acquired.2 ExperimentalThe body materials used in the experiments were5A02 aluminum alloy and 0Cr18Ni9 stainless steel, andtheir che
15、mical compositions are shown in Tables 1 and 2respectively, and the main physical properties are listedin Table 3. The tensile strength of 5A02 is 217 MPa, withan elongation of 23%, and the tensile strengthof 0Cr18Ni9 is 520 MPa, with an elongation of 40%.Foundation item: Project (2010CB731704) supp
16、orted by the National Basic Research Program of China; Project (51075089) supported by the NationalNatural Science Foundation of chinaCorresponding author: CHEN Guo-qing; Tel: +86-13936328198; Fax: +86-451-86412911; E-mail: DOI: 10.1016/S1003-6326(11)61096-0ZHANG Bing-gang, et al/Trans. Nonferrous Met. Soc. China 21(2011) 25922596 2593
