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Journal of Materials Science & Technology 2021年第1期60卷 61-69页

作者： Yunsheng Wu Xuezhi Qin changshuai wang Lanzhang Zhou Institute of Metal Research Chinese Academy of SciencesShenyang110016China School of Materials Science and Engineering University of Science and Technology of ChinaHefei230026China

The microstructure evolution and its effect on the impact toughness of a new Ni-Fe based alloy GH984 G,used in 700℃ ultra-super critical coal-fired power plant,were investigated during thermal exposure at 650℃-750℃ for up to 10,000 *** results show that the impact toughness at room tempe rature drops rapidly at the early stage during thermal exposure at 700℃ and then has no significant change even if after exposure for 10,000 *** significant decline of the impact toughness is attributed to the coarsening of M_(23)C_(6) carbides at grain boundaries,which weakens the grain boundary strength and leads to the aging-induced grain boundary *** M_(23)C_(6) carbides have almost no change with further thermal exposure and the impact toughness also remains ***,the impact toughness rises with the increase of thermal exposure *** size of γ' after thermal exposure at 750℃ for10,000 h is much bigger than that at 650℃ and 700℃ for 10,000 *** fore,the intragranular strength decreases significantly due to the transformation of the interaction between γ' and dislocation from stro ngly coupled dislocation shearing to Orowan *** plastic deformation occurs within grains after thermal exposure at 750℃ for 10,000 h,which increases the impact toughness.

关键词： Ni-Fe based alloy GH984G Long-term thermal exposure Microstructure evolution Impact toughness

Effect of Melt Superheating Treatment on Directional Solidification Interface Morphology of Multi-component Alloy

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Journal of Materials Science & Technology 2011年第7期27卷 668-672页

作者： changshuai wang Jun Zhang Lin Liu Hengzhi Fu State Key Laboratory of Solidification Processing Northwestern Polytechnical University Xi an 710072 China

The influence of melt superheating treatment on the solid/liquid （S/L） interface morphology of directionally solidified Ni-based superalloy DZ125 is investigated to elucidate the relationship between melt characteristic and S/L interface stability. The results indicate that the interface morphology is not only related to the withdrawal velocity （R） but also to the melt superheating temperature （Ts） when the thermal gradient of solidification interface remains constant for different Ts with appropriate superheating treatment regulation. The interface morphology changes from cell to plane at R of 1.1 μm/s when Ts increases from 1500°C to 1650°C, and maintains plane with further elevated Ts of 1750°C. However, the interface morphology changes from coarse dendrite to cell and then to cellular dendrite at R of 2.25 μm/s when Ts increases from 1500°C to 1650°C and then to 1750°C. It is proved that the solidification onset temperature and the solidification interval undergo the nonlinear variation when Ts increases from 1500°C to 1680°C, and the turning point is 1650°C at which the solidification onset temperature and the solidification interval are all minimum. This indicates that the melt superheating treatment enhances the solidification interface stability and has important effect on the solidification characteristics.

关键词： Melt superheating treatment Directional solidification interface morphology Solidification characteristics Multi-component alloy

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运动疗法防治癌症的作用及相关分子机制

中国免疫学杂志 2024年第1期40卷 208-212,219页

作者：江宇季铁成王长帅梁冰杨舜赵丽晶吉林大学护理学院康复治疗学教研室长春130021 吉林省电力医院康复医学科长春130022

全球约25%的癌症与肥胖和久坐的生活方式有关,改变行为方式(运动)可能是经济有效的防治手段。研究发现运动在降低癌症风险、抑制肿瘤生长、改善癌症相关生活质量以及提高治疗效果方面发挥重要作用。而这种保护机制在很大程度上尚不明确... 详细信息

全球约25%的癌症与肥胖和久坐的生活方式有关,改变行为方式(运动)可能是经济有效的防治手段。研究发现运动在降低癌症风险、抑制肿瘤生长、改善癌症相关生活质量以及提高治疗效果方面发挥重要作用。而这种保护机制在很大程度上尚不明确。阐明作用机制对于充分挖掘运动疗法的潜力至关重要,因此本文综述运动降低癌症风险的可能机制。

关键词：运动癌症分子机制综述

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Thermal Stability of a New Ni-Fe-Cr Base Alloy with Different Ti/Al Ratios

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Journal of Materials Science & Technology 2015年第2期31卷 135-142页

作者： changshuai wang Tingting wang Meilin Tan Yongan Guo Jianting Guo Lanzhang Zhou Institute of Metal Research Chinese Academy of Sciences

Influence of Ti/Al ratios on the thermal stability of a new low cost Ni-Fe-Cr base wrought alloy,designed for application at 700℃ in advanced ultra-supercritical coal-fired power plants(700℃A-USC),was investigated both experimentally and thermodynamically. After standard heat treatment,the alloys with different Ti/Al ratios had the same microstructural characteristics. However,compared with the alloys with high Ti/Al ratio,the low Ti/Al ratio can increase the γ’-solvus temperature,decrease γ’ coarsening rate and reduce the temperature range of η phase precipitation. For the alloys with low Ti/Al ratio,the yield strength has no obvious decrease during long-term thermal exposure at 700 and 750℃,but after thermal exposure at 750℃ for 5000 h,the yield strength of the alloys with high Ti/Al ratio obviously decreases due to the η phase precipitation. The influence of h phase on mechanical properties is related with its size. When the h phase is small,it has no obvious influence on mechanical properties,but h phase becomes the crack initiation site with the further growth of η phase. It can be concluded that the decrease in Ti/Al ratio can improve the thermal stability to meet the requirement of 700℃ A-USC coal-fired power plants.

关键词： 700℃ A-USC Ni-Fe-Cr base alloy Thermal stability η

Correlation Between Phase Stability and Tensile Properties of the Ni-Based Superalloy MAR-M247

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Acta Metallurgica Sinica(English Letters) 2021年第6期34卷 872-884页

作者： Linxu Li Xiufang Gong changshuai wang Yunsheng Wu Hongyao Yu Haijun Su Lanzhang Zhou State Key Laboratory of Long-Life High Temperature Materials Dong Fang Turbine Co.LtdDeyang 618000China State Key Laboratory of Solidification Processing Northwestern Polytechnical UniversityXi'an 710072China Institute of Metal Research Chinese Academy of SciencesShenyang 110016China Beijing Key Laboratory of Advanced High Temperature Materials Beijing 100081China Beijing CISRI-GAONA Materials and Technology CO. LTDBeijing 100081China

Phase stability and its effect on tensile properties of MAR-M247 alloy have been investigated during thermal exposure at 800–900°C for up to 10,000 *** investigations reveal that the larger secondaryγ′phase has no obvious growth,but the smaller tertiaryγ′phase obviously coarsens and the coalescence occurs during thermal exposure at 850°C and below.γ′coarsening behavior is consistent with the description of Ostwald ripening theory beforeγ′***-rich blocky MC carbide shows excellent thermal stability,but Ta-rich script-type MC carbide gradually degenerates via reaction,MC+γ→M_(23)C_(6)+γ′and finally formsγ film around MC and M_(23)C_(6) *** increasing thermal exposure time,the tensile strength *** ductility first increases and then decreases during exposure at 800°C,but it decreases continuously at 900°*** addition,the ductility keeps almost constant when the exposure time is longer than 5000 h.

关键词： Ni-based superalloy Phase stability Tensile properties Fractural behavior

A Revised Satellite Cloud-Derived Wind Inversion Algorithm Based on Computer Cluster

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Computers, Materials & Continua 2020年第7期64卷 373-388页

作者： Lili He Zhiwei Cai Dantong Ouyang changshuai wang Yu Jiang Chong wang Hongtao Bai College of Computer Science and Technology Jilin UniversityChangchun130012China Symbol Computation and Knowledge Engineer of Ministry of Education Jilin UniversityChangchun130012China Department of Engineering Mechanics State Marine Technical University of St.PetersburgSt.Petersburg190008Russia

In view of the satellite cloud-derived wind inversion has the characteristics of large scale,intensive computing and time-consuming serial inversion algorithm is very difficult to break through the bottleneck of *** proposed a parallel acceleration scheme of cloud-derived wind inversion algorithm based on MPI cluster parallel technique in this *** divide-and-conquer idea,assigning winds vector inversion tasks to each computing unit,is identified according to a certain *** computing unit executes the assigned tasks in parallel,namely divide-and-rule the inversion task,so as to reduce the efficiency bottleneck of long inversion time caused by serial time *** the scheme of parallel acceleration based on MPI cluster,an algorithm based on performance prediction is proposed to effectively implement load balance of MPI *** the comparative analysis of experiment data using the parallel scheme of this parallel technology framework,it shows that this parallel technology has a certain acceleration effect on the cloud-derived wind inversion *** speedup of the MPI-based parallel algorithm reaches 14.96,which achieved the expected *** the same time,this paper also proposes an efficiency optimization algorithm for cloud-derived wind *** the case that the inversion of wind vector accuracy loss is minimal,the optimized algorithm execution time can be up to 13 times faster.

关键词： Cloud-derived wind wind vector inversion parallel computing MPI speedup ratio

Cr^(3+) activated Na_(3)RESi_(3)O_(9)(RE=Y,Lu,Sc) silicate broadband near-infrared phosphors for luminescence towards NIR-Ⅱ region via a multi-site occupancy strategy

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Journal of Rare Earths 2024年第8期42卷 1447-1457,I0002页

作者： Jiantong wang changshuai Gong Sihan Yang Qi Zhu Xuejiao wang Ji-Guang Li College of Chemistry and Materials Engineering Bohai UniversityJinzhou121007China Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education) School of Materials Science and EngineeringNortheastern UniversityShenyang110819China Research Center for Electronic and Optical Materials National Institute for Materials ScienceTsukubaIbaraki 305-0044Japan

Phosphor-converted near-infrared light-emitting diodes(NIR pc-LEDs) are finding applications in various fields including food quality analysis,biomedical imaging,night vision,and *** crucial factor in the development of NIR pc-LEDs devices lies in the advancement of high-performance broadband NIR phosphors,In this work,novel Cr^(3+)-activated silicate phosphors NaRESi_(3)O_(9)(RE=Y,Lu,Sc) are *** silicate has a special 3D network structure in which RE has four different sites,forming four octahedrons and providing suitable occupation sites for Cr^(3+).The phosphors demonstrate a wide emission spectrum ranging from 750 to 1450 nm when excited by light at 468 *** full width at half maximum(FWHM),which benefits from the presence of Cr^(3+)ions occupying multiple sites,is measured to be 203 ***,the strongest emission peak is observed at a longer wavelength of 984 nm compared to most other systems activated by Cr^(3+).The Na_(3)ScSi_(3)O_(9) lattice provides a weak crystal field(Dq/B=1.97) and weak phonon-photon coupling for Cr^(3+),and the integrated emission intensity of Na_(3)ScSi_(3)O_(9):0,03Cr^(3+)is 4.66 times stronger than that of Na_(3)YSi_(3)O_(9):0.03Cr^(3+).

关键词： Rare earths Broadband near-infrared Silicate Photoluminescence Cr^(3+)

Stability of Microstructure and Mechanical Properties of GH984G Alloy during Long-term Thermal Exposure

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Stability of Microstructure and Mechanical Properties of GH9...

中国材料大会2012

作者： Tingting wang changshuai wang Jianting Guo Lanzhang Zhou Institute of Metal Research Chinese Academy of Sciences

ISBN: (纸本)9783037856086;3037856084

A low cost Ni-Fe-based wrought superalloy for 700 ℃ advance ultra-supercritical coal-fired power plants was developed. The stability of microstructure and mechanical properties of this alloy during long-term thermal exposure was investigated by SEM,TEM and tensile tests. The experimental results showed that themajor precipitates in the alloy were spherical γ′,MC and discrete M23C6 distributing along grain boundary after the long-term exposure at 700 and 750 ℃ and no harmful phases, such as σ phase and η phase, were found. However, after exposure at 800 ℃ up to 3000 h, small amount of lath-like η phase precipitated at grain boundary by consuming the surrounding γ′. The η phase exhibited a fixed orientation relationship with the γ matrix. During thermal exposure γ′ coarsened with increasing the exposure time and exposure temperature. In addition, all major phases and their stability temperature ranges were calculated by JMatPro and these results were confirmed by the experimental results. The 700 ℃ tensile tests revealed that the alloy after exposure at 700 and 750 ℃ for 3000 h exhibited excellent ductility and strength. Therefore, the GH984G alloy possessed excellent stability of microstructure and mechanical properties between 700 and 750 ℃ up to 3000 h, and it is a promising material for 700 ℃ advance ultra-supercritical coal-fired power plants.

关键词： Ni-Fe-based wrought superalloy Thermal exposure Microstructural stability Precipitate Mechanical properties

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某输水隧洞斜井进入主洞挑顶施工关键技术

现代隧道技术 2019年第S2期56卷 688-692页

作者：薛平王长帅中交一公局第五工程有限公司北京100000 中国路桥工程有限责任公司北京100011

某输水隧洞主体工程土建Ⅰ标Z1#斜井进入主洞交叉段的围岩类别属于第三系N1+2泥岩,考虑到主支洞交叉段的围岩空间三维受力状态复杂,围岩软弱,且受含水率影响较大,交叉段处斜井向正洞横向挑顶开挖后施作支护难度大,施工不当易引起围岩变... 详细信息

某输水隧洞主体工程土建Ⅰ标Z1#斜井进入主洞交叉段的围岩类别属于第三系N1+2泥岩,考虑到主支洞交叉段的围岩空间三维受力状态复杂,围岩软弱,且受含水率影响较大,交叉段处斜井向正洞横向挑顶开挖后施作支护难度大,施工不当易引起围岩变形,甚至发生坍塌等安全质量事故。本文根据工程实际科学制定挑顶施工方案,其中,交叉口段宜采取加强支护措施。主支洞交叉段一次支护施工完成后,为保证交叉口处围岩三维受力状态的稳定,应紧跟二次衬砌混凝土的模筑施工。

关键词：输水隧洞斜井进入主洞交叉段挑顶施工技术二次衬砌

DZ125定向凝固镍基高温合金组织与熔体超温处理时间的相关性

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稀有金属材料与工程 2011年第2期40卷 307-310页

作者：王常帅张军刘林傅恒志西北工业大学凝固技术国家重点实验室陕西西安710072

采用熔体超温处理方法,通过改变熔体超温处理时间研究定向凝固镍基高温合金DZ125凝固组织的演化规律。结果表明:熔体超温处理时间由15min延长到30min可以细化枝晶、减小偏析。然而,进一步延长熔体超温处理时间至60min,枝晶却略微粗化。... 详细信息

采用熔体超温处理方法,通过改变熔体超温处理时间研究定向凝固镍基高温合金DZ125凝固组织的演化规律。结果表明:熔体超温处理时间由15min延长到30min可以细化枝晶、减小偏析。然而,进一步延长熔体超温处理时间至60min,枝晶却略微粗化。熔体超温处理15min时,碳化物形貌为草书体,而熔体超温处理时间大于30min时碳化物则主要为非连续性棒状和块状。造成这种现象的主要原因是熔体超温处理时间的变化影响到熔体状态,进而影响到凝固组织。

关键词：熔体超温处理熔体超温处理时间高温合金凝固组织