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Improving the mechanical properties and inhibiting strain softening behavior of the biodegradable Zn-0.06Mg alloy via ECAP plus rolling processing

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Progress in Natural Science:Materials International 2024年第1期34卷 45-55页

作者： Chengwei Ji aibin Ma Jinghua Jiang Dan Song Huan Liu Liwen zhao Xuefei Fang College of Mechanics and Materials Hohai University Suqian Institute Hohai University

The practical application of micro-alloying Zn–Mg alloys is limited due to their poor mechanical properties and evident strain softening behavior. Therefore, this paper proposed the utilization of ECAP plus rolling processing as an innovative approach to potentially address these limitations. Herein, effects of ECAP and rolling processing on the microstructures, mechanical properties and strain softening behavior were investigated. It was found that the grain refinement achieved through 1-pass ECAP and 8-pass ECAP processing differed significantly, and subsequent rolling processing can further regulate grain size and dislocation distribution. The 1-pass ECAP plus cold rolling(1p-CR), 1-pass ECAP plus hot-cold rolling(1p-HC), and 8-pass ECAP plus hot-cold rolling(8p-HC) processed alloys exhibited heterostructure characterized by fine grains encircling coarse grains. Additionally, regions with high density dislocations were uniformly distributed alongside regions with low density dislocations. This unique microstructure promoted the accumulation and interaction of dislocation during deformation, resulting in the inhibition of strain softening behavior while maintaining high strength and high elongation. Therefore, the 1p-CR, 1p-HC, and 8p-HC alloys demonstrated excellent formability and mechanical stability while meeting the required mechanical properties for implant materials, which highlight their significant potential for practical applications.

关键词： Zn-Mg alloys ECAP Rolling Mechanical properties Strain softening behavior

Coupling of reduced inorganic fertilizer with plant-based organic fertilizer as a promising fertilizer management strategy for colored rice in tropical regions

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Journal of Integrative Agriculture 2024年第1期23卷 93-107页

作者： Tingcheng zhao aibin He Mohammad Nauman Khan Qi Yin Shaokun Song Lixiao Nie Research Center for Physiology and Ecology and Green Cultivation of Tropical Crops School of Breeding and Multiplication(Sanya Institute of Breeding and Multiplication)Hainan UniversitySanya 572000China

Colored rice is a type of high-quality,high-added-value rice that has attracted increasing attention in recent *** use of large amounts of inorganic nitrogen fertilizer in rice fields results in low fertilizer use efficiency and high environmental *** fertilizer is a promising way to improve soil quality and sustain high ***,most studies focus on the effect of animal-based organic *** effects of different ratios of plantbased organic fertilizer and inorganic fertilizer on the grain yield and quality of colored rice have rarely been ***,a two-year field experiment was conducted in 2020 and 2021 to study the effects of replacing inorganic N fertilizers with plant-based organic fertilizers on the yield,nitrogen use efficiency(NUE),and anthocyanin content of two colored rice varieties in a tropical region in *** experimental treatments included no nitrogen fertilization(T1),100% inorganic nitrogen fertilizer(T2),30%inorganic nitrogen fertilizer substitution with plant-based organic fertilizer(T3),60%inorganic nitrogen fertilizer substitution with plant-based organic fertilizer(T4),and 100% plantbased organic fertilizer(T5).The total nitrogen provided to all the treatments except T1 was the same at 120 kg *** results showed that the T3 treatment enhanced the grain yield and anthocyanin content of colored rice by increasing nitrogen use efficiency compared with *** average,grain yields were increased by 9 and 8%,while the anthocyanin content increased by 16 and 10% in the two colored rice varieties under T3 across the two years,respectively,as compared with *** study of the residual effect of partial substitution of inorganic fertilizers showed that the substitution of inorganic fertilizer with plant-based organic fertilizer improved the soil physiochemical properties,and thus increased the rice grain yield,in the subsequent *** highest grain yield of the subsequent rice crop was observe

关键词： colored rice organic fertilizer soil quality grain yield anthocyanin

坝上高原生态用地时空格局演变与生态系统服务价值分析

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农业工程学报 2017年第2期33卷 283-290页

作者：武爱彬赵艳霞河北省科学院地理科学研究所石家庄050021

为了给当地的生态用地保护和区域间生态补偿提供科学依据,该研究在坝上高原地区1990、1995、2000、2005、2010和2015年6期土地利用解译数据的基础上,通过GIS等工具分析了研究区域1990-2015年间生态用地格局演变的基本特征,并对生态用地... 详细信息

为了给当地的生态用地保护和区域间生态补偿提供科学依据,该研究在坝上高原地区1990、1995、2000、2005、2010和2015年6期土地利用解译数据的基础上,通过GIS等工具分析了研究区域1990-2015年间生态用地格局演变的基本特征,并对生态用地的生态系统服务价值进行了计算。主要结论如下:1990-2015年期间,研究区域生态用地数量呈减少趋势,其中林地和其他生态用地数量在增加,草地和湿地数量在减少。生态用地活跃程度在2000-2015年比1990-2000年期间更高。林地的空间稳定性最好,然后为草地和湿地,其他生态用地稳定性最差。生态用地生态系统服务价值由46.01亿元上升到428.26亿元,增加了8.31倍,林地和湿地提供的生态系统服务价值最大,其次为草地,其他生态用地最小,应当继续加强生态防护林建设,采取生物恢复技术,人工补水,科学禁牧、休牧、轮牧,调整产业结构等措施恢复和增加林地、湿地和草地的生态系统服务功能。

关键词：生态系统土地利用 GIS 生态用地格局演变服务价值坝上高原

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热处理对6063铝合金组织与性能的影响

热加工工艺 2010年第4期39卷 139-140,144页

作者：赵爱彬辽宁石油化工大学机械工程学院辽宁抚顺113001

利用金相显微镜观察经固溶、时效及固溶+时效处理的6063铝合金的显微组织,通过测试其硬度,得出其随温度变化的规律;并通过全浸腐蚀试验比较其耐腐蚀性,观察其在不同温度下的腐蚀形貌。结果表明,经不同温度处理的材料其显微组织发生明显... 详细信息

利用金相显微镜观察经固溶、时效及固溶+时效处理的6063铝合金的显微组织,通过测试其硬度,得出其随温度变化的规律;并通过全浸腐蚀试验比较其耐腐蚀性,观察其在不同温度下的腐蚀形貌。结果表明,经不同温度处理的材料其显微组织发生明显改变,硬度随温度呈一个波动趋势,随温度升高其耐蚀性下降。

关键词： 6063铝合金热处理显微组织耐蚀性

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青海湖湖东沙地人工植被群落特征研究

北京师范大学学报:自然科学版 2023年第4期59卷 653-660页

作者：赵爱斌娄安如北京师范大学生命科学学院北京100875 中国科学院青藏高原研究所北京100101

以恢复生态学为理论基础,采用生态系统定位研究方法,从群落学角度系统研究了在青海湖湖东高寒沙地建立的几种不同人工植被恢复样地的植物群落特征,比较分析了植被恢复过程中不同人工植物群落的物种多样性和功能多样性.研究发现:青海湖... 详细信息

以恢复生态学为理论基础,采用生态系统定位研究方法,从群落学角度系统研究了在青海湖湖东高寒沙地建立的几种不同人工植被恢复样地的植物群落特征,比较分析了植被恢复过程中不同人工植物群落的物种多样性和功能多样性.研究发现:青海湖湖东沙地人工植物可划分为“沙蒿-沙棘群落”“沙蒿-乌柳群落”和“沙棘-沙蒿群落”3个群落;人工群落的盖度与灌木层盖度变化趋势一致;实施多片层植物混合定植的人工群落,无论在物种多样性还是功能性状多样性方面均优于其他群落,且较短的定植时间就可达到较高的恢复水平.研究结果可为高寒沙漠地区的植被重建和生态系统恢复提供理论支持,特别是对高寒沙漠防风固沙工程建设中的种苗优选和人工恢复群落的资源优化配置提供了一定的科学指导.

关键词：人工植被群落特征生物多样性群落功能多样性青海湖

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16Mn钢固体渗硼工艺研究

热加工工艺 2017年第22期46卷 192-194页

作者：赵爱彬李菁辽宁石油化工大学机械工程学院辽宁抚顺113001

采用不同渗剂配比、不同加热温度对16Mn钢进行固体渗硼处理,并对其显微组织、显微硬度及试样表面成分进行分析。结果表明:渗剂(硼砂、氧化铝、氟硼酸钠)工艺为950℃×4 h的渗层厚度约为55μm;渗剂(硼砂、碳化硅、氟硼酸钠)工艺为1050℃... 详细信息

采用不同渗剂配比、不同加热温度对16Mn钢进行固体渗硼处理,并对其显微组织、显微硬度及试样表面成分进行分析。结果表明:渗剂(硼砂、氧化铝、氟硼酸钠)工艺为950℃×4 h的渗层厚度约为55μm;渗剂(硼砂、碳化硅、氟硼酸钠)工艺为1050℃×4 h的渗层厚度约为65μm。两种工艺处理后显微硬度均明显高于基体硬度,但1050℃×4 h得到的渗层与基体结合强度更高,其表面层生成FeB或FeB、Fe_2B。

关键词： 16Mn钢固体粉末渗硼显微组织显微硬度

SAF2205双相不锈钢对接焊焊接工艺的评定

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热加工工艺 2010年第9期39卷 125-127页

作者：赵爱彬张莹莹辽宁石油化工大学机械工程学院辽宁抚顺113001

研究了SAF2205双相不锈钢在不同焊接工艺和层间温度下焊接接头的组织和力学性能。结果表明:在所采用的焊接工艺参数下,GTAW和SMAW均能得到合格的焊缝,GTAW获得的焊接接头的组织和相比例优于SMAW,冲击韧度高于SMAW。连续焊时得到的金相... 详细信息

研究了SAF2205双相不锈钢在不同焊接工艺和层间温度下焊接接头的组织和力学性能。结果表明:在所采用的焊接工艺参数下,GTAW和SMAW均能得到合格的焊缝,GTAW获得的焊接接头的组织和相比例优于SMAW,冲击韧度高于SMAW。连续焊时得到的金相组织严重奥氏体化。

关键词：双相不锈钢焊接金相组织力学性能

Recycling arsenic-containing bio-leaching residue after thermal treatment in cemented paste backfill:Structure modification,binder properties and environmental assessment

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International Journal of Minerals,Metallurgy and Materials 2024年第10期31卷 2136-2147页

作者： Dengfeng zhao Shiyu Zhang Yingliang zhao Department of Mining Engineering Lyuliang UniversityLvliang 033000China School of Civil and Environmental Engineering University of Science and Technology BeijingBeijing 100083China School of Mining Engineering Taiyuan University of TechnologyTaiyuan 030024China Department of Civil and Environmental Engineering The Hong Kong Polytechnic UniversityHong Kong 00852China

The substantial arsenic(As)content present in arsenic-containing bio-leaching residue(ABR)presents noteworthy environ-mental challenges attributable to its inherent instability and susceptibility to *** its elevated calcium sulfate content,ABR exhibits considerable promise for industrial *** study delved into the feasibility of utilizing ABR as a source of sulfates for producing super sulfated cement(SSC),offering an innovative binder for cemented paste backfill(CPB).Thermal treatment at varying temperatures of 150,350,600,and 800℃ was employed to modify ABR’s *** investigation encompassed the examination of phase transformations and alterations in the chemical composition of As within ***,the hydration characteristics of SSC utilizing ABR,with or without thermal treatment,were studied,encompassing reaction kinetics,setting time,strength development,and *** findings revealed that thermal treatment changed the calcium sulfate structure in ABR,consequently impacting the resultant sample ***,calcination at 600℃ demonstrated optimal modification effects on both early and long-term strength *** enhanced performance can be attributed to the augmented formation of reaction products and a densified ***,the thermal treatment elicited modifications in the chemical As fractions within ABR,with limited impact on the As immobilization capacity of the prepared binders.

关键词： cemented paste backfill bio-leaching residue arsenic immobilization binder hydration calcination

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胸腰段骨折脱位的临床特点及手术治疗体会

中国社区医师 2015年第6期31卷 18-19页

作者：赵爱彬云南省曲靖市第一人民医院骨科 655000

目的:探讨脊柱胸腰段骨折脱位的临床特点,总结手术治疗方法。方法:2011年7月-2014年6月收治胸腰段骨折脱位患者35例,其中行前路减压复位固定术3例,后路椎弓根内固定30例,前后路同时手术2例。观察患者的临床治疗效果。结果:患者椎体间脱... 详细信息

目的:探讨脊柱胸腰段骨折脱位的临床特点,总结手术治疗方法。方法:2011年7月-2014年6月收治胸腰段骨折脱位患者35例,其中行前路减压复位固定术3例,后路椎弓根内固定30例,前后路同时手术2例。观察患者的临床治疗效果。结果:患者椎体间脱位完全复位33例(94.3%);椎体前缘压缩高度恢复正常32例(91.4%);术后随访,患者神经功能Frankel分级明显改善。结论:对于胸腰段骨折脱位患者而言,根据患者的病情选择合适的手术治疗方案,能够使骨折脱位恢复正常,并有效改善患者的神经功能。

关键词：胸腰段骨折脱位手术方案