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for dissimilar FSW of Al-Cu. Key words: aluminium; copper; friction stir welding; intermetallic compounds; mechanical properties; weld nugget zone 1 Introduction Obtaining an efficient weld... tool developed tongue-shaped stir zone composed of exclusively CuAl2 while the conical tool created heterogeneous stir zone containing less IMCs and composed of CuAl2, Cu9Al4, aluminium and copper......
J. Cent. South Univ. (2017) 24: 1866-1880 DOI: https://doi.org/10.1007/s11771-017-3594-6 Forming condition of transient saturated zone and its distribution in residual slope under rainfall... infiltration process under rainfall conditions was studied in the present work. The emphases are the formation, distribution and dissipation of transient saturated zone. As for the calculation......
, some rod Mg24(Y, Gd)5 phases on GW55 side, and a precipitation free zone (PFZ) on ZG21 side. After annealing treatment, Mg3(Y, Gd)2Zn3 particles along the bonding interface increase, rod Mg24(Y, Gd)5 phases on GW55 side decrease, and PFZ is broadened. Meanwhile, the hardness on the bonding interface zone decreases and the bonding strength increases from 126 MPa to 162 MPa. Key words: magnesium......
and discontinuities in the braze zone of copper tubes[J]. Journal of Materials Processing Technology, 2003, 45(4): 302-312. [40] KIM K S, RYU K W, YU C H, KIM J M. The formation and growth of intermetallic...-Ag-Cu系,Pd-Ag系和Pd-Au系为典型的多级钎焊用钎料[43],如表4所列,它们均有良好的钎焊工艺性能,耐蚀性和塑性,但硬度和强度不高,不适于用作高强度钎焊接头的钎料,通过时效处理可提高其硬度. 表4 常用分级钎焊用钯基钎料 Table 4 Commonly used Pd-based solders for grade brazing 2.2 高温耐热......
Numerical simulation of upsetting-extruding process of dispersion strengthened copper welding electrode WANG Meng-jun(王孟君)1, ZHANG Ying-chun(张迎春)1, HUANG Dian-yuan(黄电源)1, LIU Xin-yu(刘心宇)2 1...; Abstract: The simulation of the upsetting-extruding process of dispersion strengthened copper welding electrode was carried out using Deform-2D......
metallurgical process with Ti-Cu intermetallics as reactive products. Zone I was a mixture of Ti-Cu compounds and solid solution of copper. While zones II and III only consisted of intermetallics... side to the other side of fusion line with a small slope, which demonstrated the emergence of a thin solid solution layer of titanium. Cu content fluctuating greatly in zone I showed that compounds......
of the joint in which the holding time was 20 min. Figure 2(b) is the enlarged area of zone A in Fig.2(a). In Fig.2, it seems that the whole reaction zone at the interface during contact reactive brazing... at the interface between stainless steel and the eutectic structure, marked as zone D and zone E. The wetting and spreading behavior of Al-Cu eutectic liquid formed by contact reactive brazing on Al......
EFFECT OF Zr ADDITION TO Ti-KILLED STEEL ON INCLUSION FORMATION AND MICROSTRUCTURAL EVOLUTION IN WELDING INDUCED COARSE-GRAINED HEAT AFFECTED ZONE Z.Xu1,H.Su2,C.F.Yang2,Y.H.Yang3,Y.Q.Zhang2,F.Chai2... of Ti-bearing inclusions, favored the grain refinement of the welding induced, coarse-grained heat affected zone (CGHAZ) with enhanced impact toughness in Ti-killed steels, which were examined based......
corrosion in the tide zone than that in the immersion zone at Qingdao after long time exposure. Key words: copper alloy; seawater exposure; pitting corrosion CLC number: TG146 Document code: A 1... zone and splash zone. The properties of seawater in experimental stations (annual average) are shown in Table 1. In this experiment, 12 kinds of plates and 7 kinds of tubes of copper and copper......
] KARAMIS M B, TASDEMIRCI A, NAIR F. Microstructural analysis and discontinuities in the brazed zone of copper tubes[J]. Journal of Materials Processing Technology, 2003, 141(3): 302-312. [39] NAKA M, HAFEZ K M. Applying of ultrasonic waves on brazing of alumina to copper using Zn-Al filler alloy[J]. Journal of Materials Science, 2003, 38(16): 3491-3494. [40] ARENAS M F, ACOFF V L, REDDY R G. Physical......