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Trans. Nonferrous Met. Soc. China 23(2013) 1570-1575 Multi-stage heat treatment of aluminum alloy AA7049 R. RANGANATHA1, V. ANIL KUMAR2, VAISHAKI S. NANDI3, R. R. BHAT3, B. K. MURALIDHARA4 1... aluminum alloys in the T6 temper are known to be highly susceptible to stress corrosion cracking (SCC). Retrogression and re-aging (RRA) is a heat treatment by which the resistance to SCC is enhanced......
Transactions, 2007, 48(9): 2467-2475. [26] ZHANG Y B, JIE J C, GAO Y, LU Y P, LI T J. Effects of ultrasonic treatment on the formation of iron-containing intermetallic compounds in Al-12%Si-2%Fe alloys[J]. Intermetallics, 2013, 42: 120-125. [27] KHALIFA W, TSUNEKAWA Y, OKUMIYA M. Effect of ultrasonic treatment on the Fe-intermetallic phases in ADC12 die cast alloy[J]. Journal of Materials......
to prepare high strength and high performance cast Al-Cu alloys. Nowadays, ultrasonic treatment has been proved to be a simple and effective physical method for solidification control and microstructure refinement. Many studies on ultrasonic treatment of low-melting alloys, aluminum alloys and magnesium alloys have been reported [20,21], the ultrasonic treatment is beneficial to stimulating nucleation......
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增益尺寸 中图分类号:TG115.28 文献标志码:A Ultrasonic method for accurately sizing flaws in magnesium alloy shell YANG Yue1, DAI... Science Institute of China, Ningbo 315103, China) Abstract: The model of ultrasonic measurement for defects in magnesium alloy shell was established by using Kirchhoff approximation......
. Formation of microstructure in Al-Si alloys under ultrasonic melt treatment[C]// Light Metals. Warrendale, PA: TMS, 2012: 999-1004. [6] 马继宇, 唐康武, 黄天佑. 功率超声在液态金属处理中作用的研究[J]. 铸造技术, 2012, 33(3): 314-317.MA Ji-yu, KANG Jin-wu, HUANG Tian-you. Review of application of ultrasonic treatment in liquid metal processing[J]. Foundry Technology, 2012, 33(3): 314-317. [7] 李军文, 郭文涛, 韩志凡, 颜 宏. 超声波功率对ZA27合金凝固组织及力学性......
improvement in the mechanical properties was achieved after rheocasting. There are few works on ultrasonic treatment of magnesium alloys as compared to those on aluminum alloys. ZHANG et al [9,10] investigated the effects of ultrasonic treatment on the microstructure and mechanical properties of Mg-9.0%Al binary and AZ80 magnesium alloys, and reported the effects of ultrasonic treatment on the size......
Effects of solution heat treatment on corrosion resistance of 5083F Al alloy Seong-Jong KIM, Seok-Ki JANG Division of Marine Engineering, Mokpo Maritime University, Mokpo City, Jeonnam... suffer a little corrosion in the marine environment, when they run in high speed, and high flow rate, etc. Therefore, solution heat treatment was carried out to prevent corrosion. The optimal heat......
of fracture at ultrasonic treatment time of 20 s and 30 s 3 接头形成机制 图9所示为Mg/Ni/Mg接头形成物理模型.由于本试验是在大气环境下进行,母材Mg在加热过程中表面会生成氧化膜MgO(约2 μm)[15],从而阻止Mg,Ni元素的直接接触(见图9(a)).镁和镍的熔点分别为648.8 ℃和1453.0 ℃,在连接温度520 ℃下,母材...,最后实现以α-Mg(Ni)固溶体为主的钎缝. 图1 U-TLP连接装置示意图 Fig. 1 Schematic diagram of U-TLP bonding process 图2 不同超声作用时间下接头微观组织形貌 Fig. 2 Microstructures of joints at different ultrasonic......
ULTRASONIC SEPARATION OF MICRO-SIZED INCLUSIONSIN MOLTEN METAL X.Q.Bai1,J.C.He1 (1.Key Laboratory of National Education Ministry for Electromagnetic Processing of Materials, NortheasternUniversity, Shenyang 110004, China) Abstract:The coagulation time and position of micro-sized non-metallic inclusions in molten metal during ultrasonic separation process were investigated, and the motion......
