ZHOU Bangxin SHENG Zhongqi PENG Feng Southwest Center for Nuclear Reactor Engineering Research and Design
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Chengdu
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China P.O.Box 291-601
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Chengdu
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Sichuan
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China
金属学报(英文版)
The bonding layers in dissimilar alloy explosive bonding joints,γ/α stainless steels, copper/carbon steel and brass/γ-stainless steel have been studied by means of TEM tech- nique.The results show that the bonding is obtained by diffusion and local melting at the con- tact surface.The structure of bonding layer not only responds to the compositions of the bond- ing alloys,but also the difference between their thermal conductivities,melting points and recrystallization temperatures,Because of the small molten region and fast cooling rate,the structure of molten region could be amorphous or microcrystals,and both stable and metastable phases exsist.
关键词:
explosive bonding
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null
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null
杨悦民
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徐振高
钢铁研究学报
通过热模拟实验,对INCONEL 601合金的热加工性能进行了研究.还对不同条件下制备的试样进行了金相组织分析.实验和分析结果表明,INCONEL 601合金在900～1 200 ℃之间具有很好的热加工塑性.本文的结论在INCONEL 601合金的自由锻造工艺过程中得到了证实和应用.
关键词:
INCONEL 601
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热加工
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热模拟
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热塑性
Solid State Communications
Considering the image potential, we calculate the binding energies of a shallow donor impurity placed on the centre of a quantum box using the variational approach. The results we have obtained show that there is a great difference of the effects of image potential between the cases including impurity ion image potential and including the image potentials of impurity ion and electron simultaneously. The results also show that the image potential is important, especially when the dimensions of quantum box become small.
关键词:
well;gaas-ga1-xalxas;states
孙朝阳
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石兵
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武传标
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叶乃威
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马天军
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徐文亮
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杨竞
金属学报
doi:10.11900/0412.1961.2014.00293
对BSTMUF601合金在不同温度和应力条件下进行了拉伸蠕变实验,获得了该合金的高温蠕变的变形规律,基于此提出了一种新的修正θ映射法蠕变本构模型,该模型考虑了蠕变3阶段的蠕变特点.模型预测结果与实验结果吻合较好,平均相对误差为1.86％,相对于没有考虑第2阶段的θ映射法模型和没有考虑第1阶段的修正θ映射法模型相对误差分别减少0.10％和6.02％,表明该模型具有较强的适用性,且不降低预测精度.对蠕变和蠕变断裂试样的位错组态和空洞演化进行了显微分析,结果表明,稳态蠕变阶段蠕变应力指数都接近5,合金主要通过位错攀移越过γ'相的方式变形,并未观察到层错和微孪晶存在于y'相或基体中,蠕变变形机制主要是位错攀移.空洞在晶界上形核,长大连接形成裂纹,在应力集中作用下,裂纹沿晶界扩展,最终导致断裂,蠕变断裂机制主要是晶界断裂.
关键词:
BSTMUF601合金
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蠕变变形
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稳态蠕变速率
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蠕变断裂
张绍棋
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闫焉服
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王广欣
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顾天亮
材料热处理学报
doi:10.13289/j.issn.1009-6264.2016-X339
通过在自制的烧结焊剂S J601中添加Li2CO3,用304不锈钢埋弧对接,研究并分析了Li2CO3对SJ601的吸潮性和脱渣性的影响及机理.结果表明:在S J601中添加适量的Li2CO3能减少烧结焊剂的表面气孔,有利于提高SJ601的抗潮能力,当Li2CO3质量分数超过4％时,将不利于提高S J601的抗潮能力,添加Li2CO3有利于提高SJ601的脱渣性,当Li2CO3质量分数超过8％时,熔渣表面会形成波浪状结构,明显提高了SJ601的脱渣性.
关键词:
烧结剂
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SJ601
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焊接
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吸潮性
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脱渣性
L. H. Lang
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D. C. Kang
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S. H. Zhang
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Z. R. Wang
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S. J. Yuan
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K. B. Nielsen and J. Dancket 1) Department of Materials Engineering
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Harbin Institute of Technology
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Harbin 150001
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China 2) Aalberg University
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Denmark
金属学报(英文版)
In this paper, the forming features of tapered rectangular box during hydrodynamic deep drawing are studied by means of FEM.The effect rules of square blank corner corner amount on body wrinkling are recognized and corresponding methods are discussed. At last, the results of FEM are verified by experi- ment.
关键词:
sheet metal forming
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null
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null
Qunqiang FU
材料科学技术（英文）
At first, a series of finite element method (FEM) simulation tests were used to find the critical forming conditions of hot-galvanized sheet steel during the rectangular box drawing processing when constant blank holder forces were applied. According the test results, the reasonable alteration scope of initial variable blank holder force (VBHF) was as 1.9~2.3 T. Then, based on the test productions of blank holder force, 12 typical VBHF curves were applied to perform the simulation tests by the simulation software of DYNAFORM. The simulation test results showed that VBHF had great effects on drawing formability of hot-galvanized sheet steel during the rectangular box drawing. However, the different VBHF curves were applied to control the whole drawing and it would get great different effects. At the same tine, the VBHF had great effects on the maximum thick thinning ratio, but had little effect on the maximum thick incrassation ratio. So, reasonable application of the VBHF would greatly decrease the fractures. When the VBHF profile is taken as curve L, the best effect of drawing formability could be obtained. When curve I is used, contrary effect could be gotten. The other types of curves would cause effects between above two types of VBHF curves. Finally, the actual tests were applied to check the validity of the FEM simulation tests. The results show that the FEM simulation tests are good ways for predicting and optimizing the VBHF.
关键词:
Drawing process
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变压边力
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热镀锌钢板
Journal of Alloys and Compounds
The subsolidus phase relations in the system La2O3-B2O3-P2O5 were investigated. The system can be divided into 12 three-phase regions. There are nine binary compounds and one ternary compound in this system. The ternary compound La7O6(BO3)(PO4)(2) has a monoclinic structure, space groups P2(1)/n, with lattice constants a = 7.0172 Angstrom, b = 17.9125 Angstrom, c = 12.6500 Angstrom, beta = 97.516 degrees, V = 1576.39 Angstrom(3), and Z = 4.
关键词:
La2O3-B-3-B2O3-P2O5 system;phase relations;ternary compounds
LIANG Yong LI Ruiguo Institute of Metal Research
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Academia Sinica
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Shenyang 110015
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ChinaInstitute of Corrosion and Protection of Metals
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Aademia Sinica
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Shenyang
,
110015
,
China
材料科学技术（英文）
Recent advances in laser coating technology including laser cladding,laser surface alloying and laser vapour deposition in China are reviewed in this paper.
关键词:
laser
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null
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null
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null
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null
