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Effect of weld microstructure on brittle fracture initiation in the thermally-aged boiling water reactor pressure vessel head weld metalNoora Hyt?nen1,Zai-qing Que1,Pentti Arffman1,Jari Lydman1,Pekka...="ChDivSummary" name="ChDivSummary">Effects of the weld microstructure and inclusions on brittle fracture initiation are investigated in a thermally aged ferritic high-nickel weld of a reactor pressure......
Effect of Post Weld Heat Treatment on Microstructure and Fracture Toughness of Friction Welded Joint吴素君,HAN Bo,ZHAO Dalong,JI Yingping,SHAO LingSchool of Materials Science and Engineering,Beihang University摘 要:The effect of post weld heat treatment on the microstructure and fracture toughness of friction welded joints of Ti-6.5Al-1Mo-1V-2Zr alloy......
Twinning in weld HAZ of ZK21 commercial magnesium alloy LIU Jun-wei(刘俊伟), CHEN Ding(陈 鼎), CHEN Zhen-hua(陈振华) College of Materials Science and Engineering, Hunan University, Changsha 410082, China...; Abstract: The microstructure and properties of Mg ZK21 laser beam weld without filler were researched using optical microscopy (OM), electron microscopy and mechanical test......
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ERROR ESTIMATION OF INTERPOLATION ON PORE STRUCTURE ANALYSIS管昌生,崔崇,陆宇萍摘 要:<正>In this paper we computed the data of porestructure with Lagrange interpolation method.analyzed theconvergence of the method and deduced the corresponding errorestimation formula.关键词:......
, the relationship between keyhole depth and weld penetration is also discussed. This paper can help to better understand the dynamics in molten pool and then improve laser welding process. Key words: laser welding; keyhole evolution; weld pool dynamics; free surface tracking; weld penetration Cite this article as: LIU Jiang-wei, ZENG Ping-wang, RAO Zheng-hua, ZHANG Tian-li. Transport phenomena and keyhole......
海外Weld Range大型露天铁矿内部排土黄土龙1,2,3,章林1,2,31. 中钢集团马鞍山矿山研究院有限公司2. 金属矿山安全与健康国家重点实验室3. 华唯金属矿产资源高效循环利用国家工程研究中心有限公司摘 要:排岩工作是露天开采中重要的生产环节,露天排岩成本在生产成本中比重巨大,其中露天矿内部排岩被认为是最为经济的排岩方案.根据Weld Range铁矿Madoonga矿区矿体赋存情况,对比内部排土对采空区空间要求,发现Madoonga矿区长宽比大,沿走向长度长,适合分期分区开采,具备内部排土的可行性.调整开采顺序能够改变内部排土规模,对Madoonga矿区3个区段不同开采顺序形成的3个方案进行对比研究,发现方案三将规模最小的西区作为首采区,较为合理.通过研究方案三的生产进度计划对方案三进行优化......
were investigated. The experimental results show that, at the same process parameters, the porosity and pore size distribution of green pellets have no evident relation with the MgO bearing additive, pore size of green pellets is between 15 μm and 35 μm and the porosity of green pellets is about 34%. There is a densification and consolidation phenomenon during the induration process; the pore size......
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PREPARATION OF THE OPEN PORE ALUMINUM FOAMS USINGINVESTMENT CASTING PROCESS F.Wang1,L.C.Wang1 (1.Taiyuan Heavy Machinery Institute, Taiyuan 030024, China) Abstract:This paper briefly presents characteristics, application and development of the metal-lic foams. Sound specimen has been achieved with preparing foam aluminum by usinginvestment casting process. The preparation of plaster......
