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Novel Co-free high performance TRIP and TWIP medium-entropy alloys at cryogenic temperatures

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Journal of Materials Science & Technology 2020年第22期54卷 153-158页

作者： Ran Wei Kaisheng Zhang Liangbin Chen Zhenhua Han Tan Wang Chen Chen Jianzhong Jiang tingwei hu Fushan Li School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001China College of Physics and Electronic Engineering Xinyang Normal UniversityXinyang 464000China School of Materiab Science and Engineering Xi'an University of TechnologyXi'an710048China International Center for New-Structured Materials(1CNSM) Laboratory of New-Structured MaterialsState Key Laboratory of Silicon Materialsand School of Materials Science and EngineeringZhejiang UniversityHangzhou 310027China Key Laboratory of Tropical Translational Medicine of Ministry of Education/School of Tropical Medicine and Laboratory Medicine Hainan Medical UniversityHaikou 571199China

Recently,high-and medium-entropy alloys(HEAs and MEAs) have been found to exhibit excellent cryogenic mechanical properties,but most of them contain high-priced Co ***,developing HEAs or MEAs with high strength and ductility and relatively low cost is *** this work,novel Cofree Fex Mn(75-x) Ni(10)Cr(15)(x=50 and 55 at.%) MEAs were developed,which exhibit a good combination of low cost,high strength and ductility at cryogenic *** was found that the Fe(50)Mn(25)Ni(10)Cr(15)MEA exhibits a combination of cryogenic tensile strength of^0.98 GPa and ductility of^83 %.The excellent cryogenic mechanical properties were attributed to joint of twinning-induced plasticity(TWIP) and transformation-induced plasticity(TRIP) *** present study sheds light on developing low cost MEAs with high perfo rmance for cryogenic-tempe rature applications.

关键词： Medium-entropy alloys(MEAs) Transformation-induced plasticity(TRIP) Twinning induced plasticity(TWIP) Mechanical properties Cryogenic temperature

Toughening FeMn-based high-entropy alloys via retarding phase transformation

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Journal of Materials Science & Technology 2020年第16期47卷 167-172页

作者： Ran Wei Kaisheng Zhang Liangbin Chen Zhenhua Han Chen Chen Tan Wang Jianzhong Jiang tingwei hu Shaokang Guan Fushan Li School of Materials Science and Engineering Zhengzhou UniversityZhengzhou450001China College of Physics and Electronic Engineering Xinyang Normal UniversityXinyang464000China School of Materials Science and Engineering Xi'an University of TechnologyXi'an710048China International Center for New-Structured Materials(1CNSM) Laboratory of New-Structured MaterialsState Key Laboratory of Silicon Materialsand School of Materials Science and EngineeringZhejiang UniversityHangzhou310027China Key Laboratory of Tropical Translational Medicine of Ministry of Education/School of Tropical Medicine and Laboratory Medicine Hainan Medical UniversityHaikou571199China

Various high entropy alloys(HEAs)with improved mechanical properties were developed by reducing the phase stability and then promote the phase *** promotion of deformation-induced ma rtensitic transformation from face-centered cubic(fcc)to hexagonal close-packed(hcp)mostly focuses on overcoming the trade-off of strength-ductility of HEAs at room ***,the hcp phase is brittle at cryogenic-temperature,and thus the enhancement of cryogenic ductility of these HEAs still remains a ***,we present a concept to toughening Fe50Mn30Co10Cr10 HEAs at cryogenictemperature via retarding phase *** retarded but more persistent phase transformation at high strain level was realized via tailoring the grain *** further verify the effect of phase transformation rate on ductility of HEAs,the mechanical properties of Fe40Mn40Co10Cr10 HEAs with higher stacking fault energy were tested at room and cryogenic temperature,*** present study sheds light on developing high perfo rmance HEAs,especially for alloys with brittle phase transformation products.

关键词： High-entropy alloys(HEAs) Transformation induced ductility Mechanical properties Cryogenic temperature

Effects of Standing Time during Pretreatment on the Nitrite Concentration Detected by Spectrophotometric Method

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Journal of Materials Science and Chemical Engineering 2024年第2期12卷 73-83页

作者： Yingfei Zeng Juan hu Xianglong Bian Qianfeng Xia tingwei hu Key Laboratory of Tropical Translational Medicine of Ministry of Education School of Tropical Medicine and the Second Affiliated Hospital Hainan Medical University Haikou China Department of Bloodbank Children’s Hospital of Chongqing Medical University National Clinical Research Center for Child Health and Disorders Ministry of Education Key Laboratory of Child Development and Disorders Chongqing Key Laboratory of Pediatrics Chongqing China

Food safety problems caused by excessive nitrite addition have been frequently reported and the detection of nitrite in food is particularly important. The standing time during the pretreatment of primary sample has a great influence on the concentration of nitrite tested by spectrophotometric method. In this context, three kinds of food samples are prepared, including canned mustard, canned fish and home-made pickled water. A series of standing times are placed during the sample pretreatments and the corresponding nitrite contents in these samples are detected by spectrophotometric method based on N-ethylenediamine dihydrochloride. This study aims to find out a reasonable standing time during the pretreatment of food sample, providing influence factor for precise detection of nitrite.

关键词： Standing Time Spectrophotometric Method Nitrite Detection

Preliminary Dynamic Study on Millisecond Blasting

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昆明工学院学报 1988年第6期 71-76页

作者：卓刚毕谦胡廷炜黄呈伟

This paper presents a preliminary dynamic photoelastic investigation on millisecond blasting. Millisecond blastings with different delay time and the simultaneous blasting of two charged holes are simulated to discuss the mechanism of millisecond blasting and the comparisons between millisecond blasting and simultaneous blasting. Also the selection of delay time is developed.

关键词： dynamic photoelasticity explosion mechanics

Selection of the Datonating Parameters and Charge Modes Using Dynamic Photoelasticity

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昆明工学院学报 1988年第6期 54-62页

作者：毕谦胡廷炜李朝明董斌黄呈伟

This paper studies the problems of detonation in engineering. dealing with three different charge modes (Line *** charge and interval charge), different burden dimension, different interval dimensions and different explposive ratios between the upper and lower packed portion on the condition of interval *** tests are completed by a single hole bursting. The detonating mechanism of multiple hole bursting is also explored.

关键词： dynamic photoelasticity explosion mechanics

以实践技术为向导的空气理化检验课程教学改革探索

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黑龙江科学 2022年第21期13卷 126-128页

作者：胡廷伟吴洁杨东海南医学院热带医学院海口571199 海南医学院生物医学信息与工程学院海口571199

分析了空气理化检验课程教学中存在的问题:教材中涉及的检验方法落后,学生未全程参与实验过程,学生缺少大型仪器设备的操作机会。提出了以实践技术为向导的空气理化检验课程教学改革策略:优化教学内容,充分平衡操作技能和理论教学二者... 详细信息

分析了空气理化检验课程教学中存在的问题:教材中涉及的检验方法落后,学生未全程参与实验过程,学生缺少大型仪器设备的操作机会。提出了以实践技术为向导的空气理化检验课程教学改革策略:优化教学内容,充分平衡操作技能和理论教学二者之间的关系,根据各个节点的教学重点选择教学内容;完善教学方法与手段,重视课前预习,引导学生参与实验准备环节,建设开放性实验室,引入信息技术开展辅助教学,开展见习活动;探索实验教学模式,现场采集实验样品,夯实基础训练规程,正确分析实验结果,培养综合分析能力,量化平时实验成绩考核。探讨了教学实践改革要点:更新教材内容,优化课程结构;改进教学方法,提升动手能力;丰富教学手段,拓展教学场所;完善考核方法,提升实践能力。

关键词：实践技术空气理化检验教学改革

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储药槽设计算法的研究及应用

曲靖师范学院学报 2016年第3期35卷 6-8页

作者：李扬刘琦胡庭威西京学院信息工程学院西京学院应用统计与理学系陕西西安710123

根据储药槽对放置药盒的要求,确定放置药盒所需储药槽的规格区间,利用区间取交的方法,在冗余最小及规格类型最少的约束下,确定储药槽的宽度、高度,从而确定储药槽的规格,并给出了一个应用实例.

关键词：储药槽区间取交法平面冗余隔板间距

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与CO_2催化共聚单体的研究进展

化工新型材料 2013年第4期41卷 24-26页

作者：胡庭维丁广磊陕绍云王亚明贾庆明昆明理工大学化学工程学院昆明650500

CO2共聚物的研究开发对环境保护、资源再利用及新材料研究领域都都具有重要的意义。与CO2共聚的单体是影响其共聚物结构、性能及成本的重要因素。综述了与CO2催化共聚单体的研究进展,这些单体主要包括二元共聚的环氧丙烷、环氧环己烷,... 详细信息

CO2共聚物的研究开发对环境保护、资源再利用及新材料研究领域都都具有重要的意义。与CO2共聚的单体是影响其共聚物结构、性能及成本的重要因素。综述了与CO2催化共聚单体的研究进展,这些单体主要包括二元共聚的环氧丙烷、环氧环己烷,三元共聚的某些单体。进一步就今后CO2催化共聚的发展方向进行了探讨,可望为CO2共聚物产业化发展提供参考。

关键词：二氧化碳共聚单体研究进展

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金属-有机骨架用于各类药物的控释载体

功能材料 2016年第3期47卷 33-39页

作者：马艾华胡庭维贾庆明陕绍云苏红莹王亚明昆明理工大学化学工程学院昆明650500

新型控释药物直接作用于靶细胞,提高药理效率、减小毒副作用,已成为一种极具潜力的药疗方法。与一般药物控释载体相比,金属-有机骨架材料(metal-organic frameworks,MOFs)的优势明显,将其颗粒尺寸降至纳米级后性能更为优异,能同时兼顾... 详细信息

新型控释药物直接作用于靶细胞,提高药理效率、减小毒副作用,已成为一种极具潜力的药疗方法。与一般药物控释载体相比,金属-有机骨架材料(metal-organic frameworks,MOFs)的优势明显,将其颗粒尺寸降至纳米级后性能更为优异,能同时兼顾药物负载量、目标靶向性、表面特性改善和生物相容性等特性。目前,已有较多类药物吸附在MOFs上的研究报道,主要包括抗癌药物、抗病毒药物及消炎药物。介绍了MOFs的毒性及其发展过程,详细阐述了MOFs对于各类药物的吸附-释放情况,并对此领域的研究和发展进行总结和展望,以期对MOFs作为药物控释载体的应用有比较全面的认识。

关键词：金属-有机骨架控释药物生物毒性抗癌抗病毒消炎药物