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材料高通量制备与表征技术研究进展

稀有金属 2024年第6期48卷 858-872页

作者：穆昱颜鲁春庞晓露高克玮北京科技大学北京材料基因工程高精尖创新中心北京100083 北京科技大学材料科学与工程学院北京100083

材料基因组(MGI)技术是近年来出现的一种材料科学研发新理念,代表着当今世界材料科学研发领域的前沿趋势。通过构建快速响应的材料研发新模式,材料基因组技术可大幅度提高新材料研发效率、减少研发成本、推动材料的工程化应用。作为材... 详细信息

材料基因组(MGI)技术是近年来出现的一种材料科学研发新理念,代表着当今世界材料科学研发领域的前沿趋势。通过构建快速响应的材料研发新模式,材料基因组技术可大幅度提高新材料研发效率、减少研发成本、推动材料的工程化应用。作为材料基因组技术的关键组成部分,材料高通量实验技术目前已形成了一系列具有代表性的材料高通量制备与表征技术。阐述了高通量实验在材料基因组技术中的地位与作用,回顾了高通量实验的研究发展历程,介绍了薄膜、块体、粉体材料高通量制备技术以及光学、电磁学等材料性能的材料高通量表征技术。最后指出了在新型材料高通量表征设备开发方面的不足,并结合数据与人工智能对材料高通量实验技术的未来发展方向做出展望。

关键词：材料基因组(MGI) 高通量制备高通量表征研究进展

A strategy assisted machine learning to process multi-objective optimization for improving mechanical properties of carbon steels

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Journal of Materials Science & Technology 2022年第14期109卷 86-93页

作者： Yupeng Diao Luchun Yan kewei gao Beijing Advanced Innovation Center for Materials Genome Engineering Beijing 100083China School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083China

Improvement in individual mechanical properties of carbon steels,such as strength or ductility,can no longer keep up with the increasingly demanding service ***,it is of practical significance to improve two or more mechanical properties accurately and *** this work,five machine learning algorithms are first employed to establish prediction models for different mechanical properties(tensile strength,fracture strength,Charpy absorbed energy,hardness,fatigue strength,and elongation)based on the collected carbon steels ***,a set of mutually exclusive properties(tensile strength and elongation)and the key descriptors of the corresponding properties are identified by feature engineering,and the importance of the key materials descriptors is *** prediction models based on key descriptors for tensile strength and elongation also demonstrate good *** the key descriptors are considered as input features for the comprehensive performance(CP)calculated from the product of tensile strength and ***,we develop a machine learning prediction model for CP and successfully apply the efficient global optimization algorithm to optimize two mutually exclusive mechanical *** work provides a new multi-objective optimization strategy that is expected to be used for the development of new steels with excellent comprehensive performance.

关键词： Carbon steels Machine learning Mechanical property Tensile strength Elongation

瓷砖胶粘结层剪切强度测试机理及方法改进研究

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力学季刊 2024年第3期45卷 762-770页

作者：王滕王盈莹高可为王东阳北京东方雨虹防水技术股份有限公司北京100025

准确测量瓷砖胶粘结层剪切强度对有效预防瓷砖脱落至关重要.本文首先改造常规拉力试验机,设计出一种基于单搭接接头的剪切测试装置,开展不同厚度瓷砖胶粘结层的剪切强度测试试验,结果表明:接头破坏模式均为粘结界面脱粘开裂破坏,无瓷砖... 详细信息

准确测量瓷砖胶粘结层剪切强度对有效预防瓷砖脱落至关重要.本文首先改造常规拉力试验机,设计出一种基于单搭接接头的剪切测试装置,开展不同厚度瓷砖胶粘结层的剪切强度测试试验,结果表明:接头破坏模式均为粘结界面脱粘开裂破坏,无瓷砖胶内聚破坏;瓷砖胶层厚度越大,粘结层剪切强度越低.建立数值模型计算分析发现,单搭接接头剪切时会产生附加弯矩,导致纯剪变为拉剪,从而产生试验误差,且瓷砖胶厚度越大,剪切时因附加弯矩产生的误差越大.为消除附加弯矩对剪切测试结果的影响,本文改进剪切试验装置,通过双搭接接头对称加载的方式,有效避免因附加弯矩产生的试验误差,提高瓷砖胶粘接层剪切强度测试结果的准确性.

关键词：瓷砖胶剪切强度胶层厚度附加弯矩数值模型

Mechanism of protective film formation during CO_2 corrosion of X65 pipeline steel

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Journal of University of Science and Technology Beijing 2008年第6期15卷 702-706页

作者： Tong Li Yonggjin Yang kewei gao Minxu Lu School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China Corrosion and Protection Center University of Science and Technology Beijing Beijing 100083 China

Electrochemical techniques, X-ray diffraction （XRD）, and scanning electron microscopy （SEM） were applied to study the corrosion behaviors of X65 steel in static solution with carbon dioxide （CO2） at 65℃. The results show that iron carbonate （FeCO3） deposits on the steel surface as a corrosion product scale. This iron carbonate scale acts as a barrier to CO2 corrosion, and can reduce the general corrosion rate. The protection ability of the scale is closely related to the scale morphological characteristics.

关键词： pipeline steel carbon dioxide corrosion product scale protective film iron carbonate

Investigation of stress corre-sion cracking under anodic dissolution control

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Chinese Science Bulletin 2001年第9期46卷 717-722页

作者： Wuyang Chu Lijie Qiao kewei gao Univ Sci & Technol Beijing Dept Mat Phys Beijing 100083 Peoples R China

This review is about stress corrosion cracking (SCC) under anodic dissolution control. The section 1 is the methods distinguishing SCC controlled by anodic dissolution from those by hydrogen. The section 2 presents hydrogen-enhanced corrosion and SCC under anodic dissolution control. The section 3 demonstrates corrosion-enhanced localized plasticity and corrosion-induced deformation localization, which are the fundaments of new mechanism of SCC. The section 4 is an overview of the proposed mechanisms of SCC under anodic dissolution control. The last section proposes a new mechanism of SCC.

关键词： stress corrosion cracking hydrogen induced cracking dislocation.

High level of circPTN promotes proliferation and stemness in gastric cancer

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BIOCELL 2021年第6期45卷 1521-1526页

作者： kewei gao JIANGFENG HU YI ZHOU LIANG ZHU Department of Gastroenterology Shanghai Changzheng HospitalThe Second Military Medical UniversityShanghai200001China Department of Gastroenterology Shanghai First People’s HospitalShanghai200003China Department of Gastroenterology Shanghai Hospital of Integrated Traditional Chinese and Western MedicineShanghai200003China

Increasing evidence proves that circular RNAs(circRNAs)play an important role in regulating the biological behaviors of *** central purpose of this research was to investigate the functions of circRNA in gastric *** utilization of real-time PCR was to test circPTN expression in gastric cancer *** counting colony formation assays,CCK-8 assay,and EdU assay were used to investigate *** assay was applied to investigate *** discovered that circPTN was highly expressed in gastric cancer *** expression of circPTN inhibits gastric cancer cell proliferation and *** expression of circPTN promotes gastric cancer cell proliferation and ***,we discovered that circPTN could accelerate self-renewal and increase the expression of stemness *** results of our study suggested that a high level of circPTN expression promotes the proliferation and stemness of gastric cancer cells.

关键词： circPTN Gastric cancer Proliferation and stemness

Interactions between Pre-strain and Dislocation Structures and Its Effect on the Hydrogen Trapping Behaviors

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Acta Metallurgica Sinica(English Letters) 2023年第7期36卷 1193-1202页

作者： Rongjian Shi Yanqi Tu Liang Yang Saiyu Liu Shani Yang kewei gao Xu-Sheng Yang Xiaolu Pang Beijing Advanced Innovation Center for Materials Genome Engineering School of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijing100083China School of Mathematics and Physics University of Science and Technology BeijingBeijing100083China Department of Industrial and Systems Engineering The Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina Hong Kong Polytechnic University Shenzhen Research Institute Shenzhen518057China Key Laboratory for Advanced Materials of Ministry of Education School of Materials Science and EngineeringTsinghua UniversityBeijing100084China

This work investigated the effect of pre-strain and microstructures and their interactions on hydrogen trapping behaviors in case of 1-GPa high-strength martensitic steel Fe-0.05C-0.30Si-1.10Mn-3.50Ni-0.53Cr-0.50Mo-0.03 V(wt%).We found that the trapped reversible and trapped irreversible hydrogen contents increased significantly after applying a pre-strain of 5%,with an increase in the trapped reversible hydrogen content from 0.6 ppm in the original sample to 2.1 *** hydrogen desorption activation energy also showed a slight *** microstructural evolution revealed that the concomitant dislocation cell-twin duplex microstructure with high-density tangled dislocations after pre-strain substantially increased the trapped reversible hydrogen ***,the tangled dislocations pinned by the nanoprecipitates acted as deep irreversible hydrogen traps,increasing the trapped hydrogen at high temperatures after applying 5%*** findings provide an expanded understanding of the hydrogen trapping behaviors of pre-strained microstructures.

关键词： Hydrogen embrittlement Hydrogen trapping Pre-strain Deformed microstructure High-strength steel

Film-induced Tensile Stress during CorrosionProcess for α-Ti

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Journal of Materials Science & Technology 1998年第4期14卷 294-298页

作者： Hong LU kewei gao and Wuyng CHU(Dept. of Materials Physics, University of Science and Technology Beijing, Beijing 100083, China) Dept. of Materials Physics University of Science and Technology Beijing Beijing 100083 China

The α-Ti foil with protective layer in one side bended to corrosion surface gradually during corrosion process in 0.1 mol/L H2SO4, while the passive film was formed, i.e., a tensile stress was developed in the surface layer of the sample. The extra tensile Stress grew gradually, whose maximum value is =313 MPa (average of 5 samples), which is near or reaches the yield stress. The extra tensile stress would be added to the load Stress during SCC to facilitate the emission and motion of dislocation, so that SCC cracks could nucleate in lower Stress(or lower KI).

关键词： Film-induced Tensile Stress during CorrosionProcess for Ti SCC

Effect of Hydrogen on Dezincification Layer-Induced Stress

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Journal of Materials Science & Technology 2003年第3期19卷 287-288页

作者： Wuyang CHU, kewei gao, Yapin LIU Lijie QIAODepartment of Materials Physics, University of Science and Technology Beijing, Beijing 100083, China Dept. of Mat. Phys. Univ. of Sci. and Technol. Beijing Beijing 100083 China

The effect of hydrogen on the dezincification layer-induced stress and the susceptibility to SCC was investigated. Experimental results showed that the dezincification layer-induced stress increased with increasing hydrogen concentration, and 3x10-6 hydrogen could increase the susceptibility to SCC of brass in ammonia solution by 10%.

关键词： Brass Dezincification layer-induced stress Susceptibility to SCC Hydrogen