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Ageing behavior of an Al-Zn-Mg-Cu alloy pre-stretched thick plateZhihui Li, Baiqing Xiong, Yongan Zhang, Baohong Zhu, Feng Wang, and Hongwei Liu State Key Laboratory for Fabrication and Processing...-Mg-Cu alloy was systemically studied including one-step ageing, two-step ageing, and retrogression and reageing treatment (RRA). One-step ageing of the alloy resulted in peak ultimate tensile......
Age-hardening characteristic of an Al-Zn-Mg-Cu alloy produced by spray depositionWANG Feng, XIONG Baiqing, ZHANG Yongan, ZHU Baohong, LIU Hongwei, ZHANG Zhihui, and WANG Zixing State Key Laboratory... alloy was synthesized by spray atomization and deposition technique. GP zones and age-hardening process in the alloy were investigated using high-resolution electron microscopy (HREM), selected area......
Al-9.0Zn-2.8Mg-2.5Cu-0.12Zr-0.03Sc alloy obtains a tensile strength of 777.29 MPa and a elongation of 11.84%. Key words: Al-Zn-Mg-Cu Alloy; solution treatment; structure; mechanical properties 1 Introduction... welds [4-6]. Zr can also inhibit recrystallization in Al alloys [7]. Among these alloys, Al-Zn-Mg-Cu-Zr-Sc alloy has attached much attention in recent years. Nevertheless, researches showed that a refined......
for a relative long time. After 44h, the microstructure of this stage contains predominantly the η′ phase and the η phase. Key words: Al-Zn-Mg-Cu alloy; spray forming; precipitate; mechanical property...究120℃下该合金的时效曲线和沉淀析出行为. 研究结果表明: 该合金在120℃时效4h强度即可达到800MPa以上; 16h达到峰时效状态, 强度可达820MPa, 此阶段GPⅠ区和GPⅡ区联合强化起主导作用; 44h后存在长时间的时效平台, 强度在800MPa左右, 此阶段η′相和η相起主导强化作用. 关键词: Al-Zn-Mg-Cu合金; 喷射成形; 沉淀析出; 力学性能 中图分类号......
of Al-Zn- Mg-Cu alloy 图5 不同细化剂加入量下Al-Zn-Mg-Cu合金的显微组织 Fig. 5 Microstructures of Al-Zn-Mg-Cu alloy 细化剂加入到熔体之后,纳米TiC在Ti的负载下在铝液中均匀分散,TiC与Al之间的晶格错配度为,两者具有良好的共格关系,因此,TiC颗粒是有效的形核质点,同时,载体Ti粉与Al反应放出大量热量,在... alloy with various additions of refiner 图7 不同细化剂加入量下Al-Zn-Mg-Cu合金的XRD谱 Fig. 7 XRD spectrum of Al-Zn-Mg-Cu aluminum alloy with various additions of refiner 图8所示为添加0.5%TiC/Ti细化剂的 Al-Zn- Mg-Cu合金......
studied by OM, XRD, DSC, SEM and EDX techniques. The results show that the as-cast microstructure of Al-(7.8-9.0)Zn-1.6Mg-(1.0-2.2)Cu aluminum alloy mainly consists of Mg(Zn, Al, Cu)2 phase and α(Al... particles in the matrix are some small Fe-rich particles after being homogenized at 470 ℃ for 24 h. Key words: Al-Zn-Mg-Cu alloy; as cast; homogenization; microstructure  ......
be helpful to relieve the residual stresses. Key words: Al-Zn-Cu-Mg alloy; quench sensitivity; TTP curve; precipitation 7×××系(Al-Zn-Mg-Cu)合金具有较高的室温强度和良好的综合性能,是世界各国航空,航天,交通运输等领域不可或缺的结构材料[1-2].经过80多年的发展... Sci Eng A, 2004, 371(1/2): 82-90. [15] DESCHAMPS A, BR?CHET Y. Nature and distribution of quench-induced precipitation in an Al-Zn-Mg-Cu alloy[J]. Sci Mater, 1998, 39(11): 1517-1522. [16] CONSERVA M......
of the Al3Zr precipitation particles is more homogeneous comparing the two-stage homogenization of 400 ℃/12 h + 470 ℃/12 h with that of 470 ℃/12 h. Key words: Al-Zn-Mg-Cu aluminum alloy... Table 1 Chemical composition of investigated Al-Zn-Mg-Cu alloy  ......
. The alloy reaches its maximum hardness after being aged at 120 ℃ for 14 h, associated with a massive precipitation of intermediate η′-phase (MgZn) in the matrix. Key words: Al-Zn-Mg-Cu alloy; spray... suitable for the preparation of high solute Al-Zn-Mg-Cu series alloys. In the present study, a new Al-Zn-Mg-Cu alloy with zinc of 11.5% (mass fraction) was synthesized using the SF process, followed......