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Interfacial microstructure evolution and bonding mechanisms of 14YWT alloys produced by hot compression bonding

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Journal of Materials Science & Technology 2019年第8期35卷 1671-1680页

作者： Liying Zhou shaobo feng Mingyue Sun Bin Xu Dianzhong Li Shenyang National Lab. for Materials Science Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China School of Materials Science and Engineering University of Science and Technology of China Shenyang 110016 China

Hot compression bonding was first used to join oxide-dispersion-strengthened ferrite steels(14 YWT)under temperatures of 750–1100℃ with a true strain range of 0.11–0.51. Subsequently, the microstructure evolution and mechanical properties of the joints were characterized, revealing that the 14 YWT steels could be successfully bonded at a temperature of at least 950℃ with a true strain of 0.22, without degrading the fine grain and nanoparticle distribution, and the presence of inclusions or micro-voids along the bonding interface. Moreover, the joints had nearly the same tensile properties at room temperature and exhibited a similar fracture morphology with sufficient dimples compared to that of the base material. An electron backscattered diffraction technique and transmission electron microscopy were systematically employed to study the evolution of hot deformed microstructures. The results showed that continuous dynamic recrystallization characterized by progressive subgrain rotation occurred in this alloy, but discontinuous dynamic recrystallization characterized by strain-induced grain boundary bulging and subsequent bridging sub-boundary rotation was the dominant nucleation mechanism. The nuclei will grow with ongoing deformation, which will contribute to the healing of the original bonding interface.

关键词： Oxide dispersion strengthened steels Hot compression bonding Dynamic recrystallization Tensile property

Dynamic recrystallization behavior and interfacial bonding mechanism of 14Cr ferrite steel during hot deformation bonding

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Journal of Materials Science & Technology 2020年第8期36卷 92-103页

作者： Liying Zhou Wenxiong Chen shaobo feng Mingyue Sun Bin Xu Dianzhong Li Shenyang National Lab.for Materials Science Institute of Metal ResearchChinese Academy of ScienceShenyang110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang110016China Key Laboratory of Nuclear Materials and Safety Assessment Institute of Metal ResearchChinese Academy of SciencesShenyang110016China

In this study, hot compression bonding was first applied to join 14Cr ferrite steel at temperatures of 950–1200°C and strains of 0.11–0.51 under strain rates of 0.01–30 s^(-1).Subsequently, tensile tests were performed on the joints to evaluate the reliability of the joints *** microstructural analyses suggest that two different competing dynamic recrystallization(DRX) mechanisms occur during the bonding process depending on the strain rate, and the joints obtained at different strain rate exhibits distinct healing *** a low strain rate(0.01 s^(-1)), continuous DRX occurs, as expected in high-stackingfault-energy materials, and is characterized by the progressive conversion of the sub-boundaries into larger-angle boundaries, which involves very limited grain boundaries *** addition, straininduced precipitation(SIP) is sufficient under this condition, further impeding the healing of bonding ***, the joints obtained at low strain rate fractured at the bonding interface *** discontinuous DRX is activated at high strain rates(10 and 30 s^(-1)).Under this condition, the formation of sub-boundaries is severely suppressed, resulting in the piling-up of dislocations and hence the storage of a greater amount of stored energy for nucleation and subsequent nuclei growth via the long-distance grain boundaries ***, the SIP process is sluggish, making the conditions much more favorable for grain boundaries migration which plays a key role in the healing of the original bonding ***, the joints can be successfully bonded when a high strain rate is applied, with the joints exhibiting tensile properties similar to that of the base material.

关键词： Hot compression bonding Dynamic recrystallization Ferrite Strain-induced precipitation Tensile property

Microgravity Material Research in China:2012–2014

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空间科学学报 2014年第5期34卷 757-764页

作者： WANG Yuren DAI Guoliang WANG Jing feng shaobo LUO Xinghong ZHOU Yanfei CHEN Lidong YU Yude National Microgravity Laboratory Institute of MechanicsChinese Academy of Sciences Institute of Metal Research Chinese Academy of Sciences Shanghai Institute of Ceramics Chinese Academy of Sciences National Key Laboratory for Optoelectronic Integration Institute of SemiconductorsChinese Academy of Sciences

During 2012–2014, the main research activities from microgravity material research were focused on, which include study of microgravity effects on collagen fibrillogenesis and HAP crystallization, microgravity experi... 详细信息

关键词： Collagen fibrillogenesis Crystallization Microgravity Refractory alloy Facility

The Evaluation Model of R&D Project Supply Chain Risk Conduction Based on Probability ID

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The Evaluation Model of R&D Project Supply Chain Risk Conduc...

Study on the Location of Emergency Resources Distribution Center Based on FAHP

2011 International Conference on Information Management and Engineering(ICIME 2011)

作者： Yang Chaoxing Zhang Zhifeng He Yao feng shaobo Management Science and Engineering Missile Institute of Air Force Engineering University

ISBN: (纸本)9781612842387

For the effective management of SC risk, risk conduction characteristic needs to be evaluated quantitatively. Based on classic energy theory, the probability influence diagram of R&D project supply chain risk conduction was established from topology layer, functional layer and numerical layer, the applicability of which was analyzed as well. Considering the decision-making aspect, the evaluation frame of R&D project supply chain risk conduction was designed finally.

关键词： research & develop project supply chain risk conduction probability influence diagram evaluation.

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Study on the Location of Emergency Resources Distribution Ce...

基于随机森林和长短期记忆网络模型的高压气井环空带压预测方法

2011 International Conference on Information Management and Engineering(ICIME 2011)

作者： feng shaobo Gao hongni Yang chaoxing He yao Management Science and Engineering The Missile Institute of Air force Engineering University

ISBN: (纸本)9781612842387

Combining with the quest character of the emergency resources distribution, the paper designs the location of the emergency resources distribution center evaluation index system and ascertains the weight of every evaluation index with fuzzy analytical hierarchy process (FAHP), and establishes a synthetic evaluation method of the index system. From this, we can get an effective way of the location of the emergency resources distribution center when the emergency happens.

关键词： emergency resources distribution center location FAHP

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天然气工业 2024年第9期44卷 167-178页

作者：张智王翔辉黄媚冯少波油气藏地质及开发工程全国重点实验室·西南石油大学 610500 中国石油西南油气田公司中国石油塔里木油田公司

高压气井在生产过程中持续的环空带压容易引起套管柱变形或挤毁,是高压气井完整性失效的主要原因之一。为解决传统方法环空带压预测精度不高的问题,以鄂尔多斯盆地苏里格气田某高压气井为例,首先利用主成分分析法和相关系数法找到影响... 详细信息

高压气井在生产过程中持续的环空带压容易引起套管柱变形或挤毁,是高压气井完整性失效的主要原因之一。为解决传统方法环空带压预测精度不高的问题,以鄂尔多斯盆地苏里格气田某高压气井为例,首先利用主成分分析法和相关系数法找到影响环空带压的主要因素,然后使用高压气井井筒温压场理论值和孤立森林模型对主成分进行物理解释和数据清洗,再对清洗后的数据使用随机森林(RF)和长短期记忆网络(LSTM)模型建立了环空带压定量预测模型,并对两类模型进行权重组合,最终建立了精确度高于任意单一模型的RF—LSTM组合环空带压预测新模型。研究结果表明:(1)环空带压的主要影响因子有温度分量、压力分量、产量分量、腐蚀程度、生产状态,而温度分量与环空带压间存在最高关联性;(2)通过错误格式、离群点及基于井筒温压场的数据清洗,可以得到数据清洗后的环空带压影响因素训练集;(3)通过平均绝对误差法(MAE)能够建立误差分数小于任意单一模型,而拟合优度介于两者之间的组合模型,因此可以将具有高拟合优度和低误差分数的两类模型结合,从而组合出同时满足两种分数的组合模型。结论认为:(1)运用大数据挖掘技术及算法进行环空带压定量预测,方法新颖,预测精度高,结果可行;(2)该方法为现场环空带压预测和风险管控提供了决策工具参考,为实现环空带压风险实时预测、预警和管控提供了理论支撑。

关键词：环空带压数据挖掘随机森林主成分分析 LSTM 大数据预测方法

SRR99镍基单晶高温合金在落管微重力环境下的枝晶生长行为研究

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稀有金属 2012年第3期36卷 341-346页

作者：封少波罗兴宏中国科学院金属研究所特殊环境材料研究部辽宁沈阳110016

利用50m长落管研究了SRR99镍基单晶高温合金在微重力与重力环境下的枝晶生长行为。采用金相显微镜观察了试样在微重力(微重力试样)和重力(重力试样)下凝固组织的差异,并利用图像分析软件测量了枝晶的一次臂和二次臂的长度及间距。结果表... 详细信息

利用50m长落管研究了SRR99镍基单晶高温合金在微重力与重力环境下的枝晶生长行为。采用金相显微镜观察了试样在微重力(微重力试样)和重力(重力试样)下凝固组织的差异,并利用图像分析软件测量了枝晶的一次臂和二次臂的长度及间距。结果表明,微重力试样在下落过程中从未熔部分外延生长的最大长度约为1.7mm,重力试样的最大长度为1.9mm。微重力试样的一次枝晶干粗大,平均间距约为80μm,而重力试样中存在较多的细小一次枝晶干,一次臂平均间距约为71μm。一次枝晶平均间距在微重力环境下增大20%。微重力试样的二次臂长度较长,且在20～160μm的整个长度范围内较均匀分布;重力试样二次臂长度较短,且集中分布在20～80μm区间内。微重力试样和重力试样的二次枝晶臂平均间距相同,均为17μm。

关键词：单晶高温合金微重力枝晶生长

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贺兰山岩画的存在论分析

四川文物 2010年第4期 76-82页

作者：王毓红冯少波集美大学文学院

贺兰山岩画是视觉语言的具体表述,在这一表述形式之外,它是无法存在的。这一表述形式本身具有生存论和存在论上的价值。无论是从被视知觉感觉到或经验到的意义和物体或现象来看,还是就贺兰山岩画自身生存的具体语境而言,整个贺兰山岩画... 详细信息

贺兰山岩画是视觉语言的具体表述,在这一表述形式之外,它是无法存在的。这一表述形式本身具有生存论和存在论上的价值。无论是从被视知觉感觉到或经验到的意义和物体或现象来看,还是就贺兰山岩画自身生存的具体语境而言,整个贺兰山岩画视觉语言系统都可以被区分为独体岩画和合体岩画两个子系统。前者指内部有着一定结构关系的、相对独立存在的、意义相对完满自足的单个岩画形式,后者指由两个或两个以上独体岩画形式结构的、相对独立存在的岩画形式。贺兰山岩画里绝大多数是合体岩画形式。

关键词：贺兰山岩画视觉语言形式独体岩画合体岩画

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烟草何以征服中国

寻根 2009年第4期 29-35页

作者：冯少波集美大学文学院

在中国，吸烟是一种非常普遍的现象。据中国消费者协会的一项调查，目前中国有3．5亿烟民，15岁以上人群总吸烟率为31．1％。吸烟已经成为一种可以与饮酒并驾齐驱的基本消费，甚至可以和食品饮料相提并论，不可或缺。

关键词：中国消费者协会征服烟草吸烟率食品饮料国有