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Journal of magnesium and Alloys 2023年第2期11卷 753-761页

作者： Chaosheng ma Wenbo YU Tongtong Zhang Zihua Zhang yihu ma Shoumei Xiong Center of materials Science and Engineering School of Mechanical and Electronic Control EngineeringBeijing Jiaotong UniversityBeijing 100044China Research Center of Rail Vehicles Safety Monitoring and Health management Beijing Jiaotong UniversityBeijing 100044China School of materials Science and Engineering Tsinghua UniversityBeijing 100084China

3D reconstruction and 2D observation were conducted to characterize the microstructure of the castings produced through high pressure die casting with different *** results indicate that shrinkage pores generally co-existed with externally solidiﬁed crystals(ESCs).In specimen produced without fast slow shot speed,big net-shrinkage pores accompanied with ESCs were found in the center of the *** the casting pressurization was introduced,the shrinkage pores gathered to the specimen center and became much less due to the optimization of melt *** more porosity was found near the gate rather than in the middle of the rod bar,especially gas ***ﬁlling process simulation reveals that the middle position of the bars wasﬁrstlyﬁlled and followed by the near gate position accompanied with one intense turbulentﬂow.

关键词： HPDC parameters Externally solidiﬁed crystals(ESCs) Porosity 3D reconstruction.

One developed finite element model used in nano-layered flaky Ti_(2)AlC maX ceramic particles reinforced magnesium composite

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Journal of magnesium and Alloys 2024年第10期12卷 4219-4228页

作者： Wantong Chen Jingyu Yang Wenbo Yu Yishi Su Ang Zhang Chaosheng ma yihu ma Center of materials Science and Engineering School of Mechanical and Electronic Control EngineeringBeijing Jiaotong UniversityBeijing 100044China State Key Laboratory of Metal matrix Composites School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China National Engineering Research Center for magnesium Alloys College of Materials Science and EngineeringChongqing UniversityChongqing 400044China

As one novel reinforcement used in magnesium composite,nano-layered flaky ternary maX particle exhibits interesting anisotropic ceramic and metal *** order to accurately simulate the mechanical properties and damage behavior of maX particle reinforced magnesium composite,we developed one finite element(FE)model based on 2D and 3D microstructural observations of 10 vol.%Ti_(2)AlC-AZ91D *** improve the accuracy,matrix ductile damage,particle internal delamination deformation behaviors,and particle-matrix interfacial behaviors were respectively introduced into this *** visual deformation processes of crack generation and propagation were carefully presented and *** effects of interfacial strength and particle orientation on material properties were systematically investigated.

关键词： maX phases Mg composites Mechanical properties Damage behavior FE method

Effects of plasma spraying process on microstructure and mechanical properties of Cr_(2)AlC/410 composite coatings

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High-Speed Railway 2024年第2期2卷 110-115页

作者： yihu ma Chaosheng ma Guozheng ma Wenbo Yu Center of materials Science and Engineering School of Mechanical and Electronic Control EngineeringBeijing Jiaotong UniversityBeijing 100044China National Key Lab for Remanufacturing Army Academy of Armored ForcesBeijing 100072China

To investigate the influences of Cr_(2)AlC mass fraction and supersonic plasma spraying process on the microstructure and mechanical properties of Cr_(2)AlC reinforced 410 stainless steel composite coatings,the coatings containing different mass fractions of Cr_(2)AlC were prepared and *** composite coating exhibited low porosity and high adhesion *** addition of Cr_(2)AlC significantly enhanced the hardness of the composite coatings through particle ***,when the mass fraction of Cr_(2)AlC was 20%,the aggregation of Cr_(2)AlC resulted in a strong decrease in the coating preparation efficiency,as well as a decline in adhesion *** the supersonic plasma spraying process,the Ar flow rate mainly influenced the flight velocity of the particles,while the H_(2) flow rate and the current mainly affected the temperature of the plasma ***,all of them influenced the melting degree of particles and the quality of the *** lowest porosity and the highest hardness and adhesion strength could be obtained when the Ar flow rate is 125 L/min,the H_(2) flow rate is 25 L/min,and the current is 385 A.

关键词： maX phase Plasma spray Parameter Coating

The research on the high strength and anti-arc ablation coatings applied in steel conductive rail

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High-Speed Railway 2023年第3期1卷 179-184页

作者： yihu ma Wenbo Yu Chaosheng ma Guozheng ma Center of materials Science and Engineering School of Mechanical and Electronic Control EngineeringBeijing Jiaotong UniversityBeijing 100044China National Key Lab for Remanufacturing Army Academy of Armored ForcesBeijing 100072China

In order to enhance the ablation-resistant performance of stainless-steel conductive rails,Mo coating,410 stainless steel coating and 15 wt%Cr_(2)AlIC particles reinforced 410 stainless steel composite coating were prepared and *** from the weak interfacial strength caused by the dissimilar metals between Mo and steel rails,410 stainless steel coating has better interfacial contact with steel *** introduction of Cr_(2)AlC into 410 stainless steels further strengthened the mechanical properties of coating by alloy strengthening effect and particle strengthening effect,as the decomposition of Cr_(2)AlC into nano CrC particles is accompanied with the diffusion of Al atoms into 410 stainless *** was found that the composite coating can still resist arc erosion at 150 A current,as a dense oxide film formed during the ablation process and the decomposition of Cr_(2)AlC contributed to the heat absorption.

关键词： Conductive stainless-steel rails Arc-ablation maX phase Coating

风力发电塔岩石地基中预应力自锁头锚杆抗疲劳试验研究

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建筑结构 2016年第14期46卷 1-7页

作者：马逸鹄黄张裕江苏金海新能源科技有限公司盐城224400

提出了一种新型预应力自锁头锚杆,靠自锁头和岩石间压紧摩擦锚固,并施加预应力减小锚杆的疲劳应力幅,自锁头锚杆可代替传统岩石锚杆用作基础和岩石间的锚固。分别进行了传统锚杆的疲劳试验和静力试验与自锁头锚杆的疲劳试验和静力试验,... 详细信息

提出了一种新型预应力自锁头锚杆,靠自锁头和岩石间压紧摩擦锚固,并施加预应力减小锚杆的疲劳应力幅,自锁头锚杆可代替传统岩石锚杆用作基础和岩石间的锚固。分别进行了传统锚杆的疲劳试验和静力试验与自锁头锚杆的疲劳试验和静力试验,共4组试验。通过对试验结果的整理和分析发现,岩石自锁头锚杆的抗疲劳性能是传统锚杆的45倍,并比传统锚杆的极限抗拔承载力高。自锁头锚杆可以安全可靠地运用在岩石地基上的风力发电塔基础或类似的岩石地基抗疲劳领域。

关键词：风力发电塔岩石基础锚杆自锁抗疲劳

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基于本福特定律的桥梁健康监测数据审计方法

同济大学学报（自然科学版） 2023年第4期51卷 534-541页

作者：陈艾荣李梓巍潘玥王达磊马逸鹄同济大学土木工程学院上海200092 同济大学电子与信息工程学院上海201804

结构检监测数据是确保结构运营状态良好、提供维护决策的基础。结构数据通常以人工检测、传感器采集为主,核实难度大、获取成本高。由于缺少有效数据审计方法,健康监测数据精度、可靠性无法检验,影响基础设施管养与结构运营。提出了基... 详细信息

结构检监测数据是确保结构运营状态良好、提供维护决策的基础。结构数据通常以人工检测、传感器采集为主,核实难度大、获取成本高。由于缺少有效数据审计方法,健康监测数据精度、可靠性无法检验,影响基础设施管养与结构运营。提出了基于本福特定律的桥梁健康监测数据审计方法,以人工检测裂纹长度、桥梁加速度数据为例开展实例分析,分析结果表明本福特定律对于结构检监测场景中自然形成数据具有较好适应性,可有效识别数据特征、反映数据异常。

关键词：健康监测数据审计本福特定律土木工程

播期对浙东南地区直播晚粳稻产量、生育期及温光利用的影响

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核农学报 2022年第12期36卷 2462-2473页

作者：马义虎何贤彪朱练峰余山红张中熙浙江省台州市农业科学研究院浙江临海317000 中国水稻研究所水稻生物学国家重点实验室浙江杭州311400

为筛选适宜在浙东南地区作受灾补播的直播晚粳稻品种,选用3个籼粳杂交稻(甬优1540、甬优7850、嘉优中科3号)和2个常规粳稻(秀水519、秀水417),开展大田分期直播试验,研究不同播期对水稻产量及产量构成因素、生育期和温光资源利用的影响... 详细信息

为筛选适宜在浙东南地区作受灾补播的直播晚粳稻品种,选用3个籼粳杂交稻(甬优1540、甬优7850、嘉优中科3号)和2个常规粳稻(秀水519、秀水417),开展大田分期直播试验,研究不同播期对水稻产量及产量构成因素、生育期和温光资源利用的影响。结果表明,水稻产量表现为籼粳杂交稻>常规粳稻,具体为甬优1540>甬优7850>嘉优中科3号>秀水519>秀水417,随着播期的推迟,产量均呈下降趋势,下降幅度为籼粳杂交稻>常规粳稻,播期每推迟5 d,籼粳杂交稻平均产量下降0.71 t·hm^(2),常规粳稻下降0.30 t·hm^(2),主要与每穗粒数和结实率显著降低有关;水稻生育时期随播期推迟而相应顺延,且播种-齐穗期、齐穗-成熟期等生育阶段缩短,籼粳杂交稻全生育期缩短幅度大于常规粳稻;水稻全生育期的有效积温、日照时数及其利用率和有效积温生产效率随播期推迟基本呈下降趋势,同一播期内,籼粳杂交稻有效积温生产效率高于常规粳稻。产量与齐穗-成熟期的温光资源呈显著或极显著正相关。救灾品种若在7月15日前补播,籼粳杂交稻首选甬优1540,其次为甬优7850,而常规粳稻宜选用秀水519,且播期可推迟至7月20日。本研究结果可为浙东南地区受灾后,采用直播技术选择适宜救灾补播品种提供实践指导与科学依据。

关键词：播期直播稻产量温光利用救灾

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高温胁迫对水稻的影响及其对策的研究进展

中国农学通报 2015年第9期31卷 1-8页

作者：马义虎杨祥田浙江省台州市农业科学研究院浙江临海317000

在全球气候变暖的大环境下,极端天气尤其是高温热害频繁发生,研究高温对水稻影响的机理与对策对促进水稻生产具有重要意义。综述了高温胁迫对水稻生长发育、产量形成和稻米品质的影响,并从光合特性及干物质积累、代谢酶、激素和抗逆物... 详细信息

在全球气候变暖的大环境下,极端天气尤其是高温热害频繁发生,研究高温对水稻影响的机理与对策对促进水稻生产具有重要意义。综述了高温胁迫对水稻生长发育、产量形成和稻米品质的影响,并从光合特性及干物质积累、代谢酶、激素和抗逆物质等方面阐述了其生理机制,提出减轻水稻高温胁迫的具体防御措施,并对未来全球气温升高环境下的水稻生产研究提出建议。

关键词：水稻高温胁迫生长发育产量品质生理机制对策

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浙江省水稻主栽品种抗稻曲病性鉴定与评价

山西农业科学 2018年第2期46卷 163-166页

作者：余山红马义虎王会福台州市农业科学研究院浙江临海317000

为探明浙江省水稻主栽品种对稻曲病的抗性水平,为抗病水稻品种的选择和推广布局提供参考依据,在网室、田间病圃同时以自然诱发方式对浙江省23个水稻主栽品种进行抗稻曲病性鉴定,分别用病穗率、病情指数和平均每穗曲球数进行评价。结果显... 详细信息

为探明浙江省水稻主栽品种对稻曲病的抗性水平,为抗病水稻品种的选择和推广布局提供参考依据,在网室、田间病圃同时以自然诱发方式对浙江省23个水稻主栽品种进行抗稻曲病性鉴定,分别用病穗率、病情指数和平均每穗曲球数进行评价。结果显示,杂交稻比常规稻感病,籼粳杂交稻发病最严重;自然发病条件下病穗率、平均每穗曲球数与病情指数高度相关且存在直线回归关系,可用病穗率作为抗性评价指标以简化病情调查程序,尤其在鉴定大量水稻品种抗病性时更有效。目前,浙江省水稻主栽品种对稻曲病的抗性水平较低,需引起重视。

关键词：水稻主栽品种稻曲病抗性鉴定自然诱发浙江省

浙东南地区优质稻产量与品质对不同播期气候因子的响应

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浙江农业学报 2023年第4期35卷 736-751页

作者：马义虎曾孝元何贤彪周奶弟陈剑台州市农业科学研究院生态环境研究所浙江临海317000 浙江省台州市农业技术推广中心浙江台州318000 浙江省仙居县农业技术推广中心浙江仙居317300

为明确浙东南地区不同类型优质稻的适宜播期,以籼粳杂交稻甬优1540和杂交籼稻泰两优217为材料,开展大田分期播种试验,研究5个不同播期(Ⅰ~Ⅴ期)对水稻产量及其构成因素、生育期、秧苗素质、分蘖特性、群体生长率、干物质积累和稻米品质... 详细信息

为明确浙东南地区不同类型优质稻的适宜播期,以籼粳杂交稻甬优1540和杂交籼稻泰两优217为材料,开展大田分期播种试验,研究5个不同播期(Ⅰ~Ⅴ期)对水稻产量及其构成因素、生育期、秧苗素质、分蘖特性、群体生长率、干物质积累和稻米品质的影响,并分析水稻产量、品质与气候因子之间的相关性。结果表明:随播期推迟,甬优1540和泰两优217产量先增后减,分别以第Ⅱ期和第Ⅲ期最高,其对应的产量潜力分别为11.54和9.47 t·hm^(-2);其构成因素的变化趋势与产量变化基本一致。生育时期随播期推迟而相应顺延,播种齐穗期缩短,齐穗成熟期延长,全生育期变化因品种而异。随播期推迟,秧苗素质、干物质积累和收获指数先提高后降低,分蘖数上升而成穗率下降,群体生长率和茎叶输出率因品种、生育阶段不同而存在差异。播期主要影响稻米的加工和外观品质,其品质总体随播期推迟呈变优的趋势。产量与齐穗成熟期的温光资源显著或极显著正相关,而品质与齐穗20 d至成熟期的温光资源关系密切。综上,在该地区甬优1540高产与优质同步的播期为5月7日至5月26日;泰两优217高产且相对优质的播期为5月16日至5月22日,而优质且相对高产的播期为5月23日至5月27日。

关键词：浙东南优质稻产量品质播期气候因子