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MECHANICAL PROPERTIES OF DIRECTIONALLY-SOLIDIFIED Ni_3Al CONTAINING BORON AND CARBON

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中国有色金属学会会刊：英文版 1997年第2期7卷 87-91页

作者： Zhang, Yun lin, dongliang Shanghai Jiao Tong Univ Shanghai China

ＭＥＣＨＡＮＩＣＡＬＰＲＯＰＥＲＴＩＥＳＯＦＤＩＲＥＣＴＩＯＮＡＬＬＹＳＯＬＩＤＩＦＩＥＤＮｉ３ＡｌＣＯＮＴＡＩＮＩＮＧＢＯＲＯＮＡＮＤＣＡＲＢＯＮ①ＺｈａｎｇＹｕｎ，ＬｉｎＤｏｎｇｌｉａｎｇＩｎｓｔｉｔｕｔｅｏｆ... 详细信息

ＭＥＣＨＡＮＩＣＡＬＰＲＯＰＥＲＴＩＥＳＯＦＤＩＲＥＣＴＩＯＮＡＬＬＹＳＯＬＩＤＩＦＩＥＤＮｉ３ＡｌＣＯＮＴＡＩＮＩＮＧＢＯＲＯＮＡＮＤＣＡＲＢＯＮ①ＺｈａｎｇＹｕｎ，ＬｉｎＤｏｎｇｌｉａｎｇＩｎｓｔｉｔｕｔｅｏｆＭａｔｅｒｉａｌｓＳｃｉｅｎｃｅａ...

关键词： intermetallics Ni 3Al stoichiometry solid solution alloying mechanical property

SIMULATIVE INVESTIGATION OF GRAIN BOUNDARIES IN NiAl ALLOY

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中国有色金属学会会刊：英文版 1999年第1期9卷 107-112页

作者： Liu, Zhenyun Huang, Baiyun lin, dongliang Central South Univ of Technology Changsha China

１ＩＮＴＲＯＤＵＣＴＩＯＮＮｉＡｌａｌｏｙｗｉｔｈａＢ２ｓｔｒｕｃｔｕｒｅｈａｓａｈｉｇｈｍｅｌｔｐｏｉｎｔ（１６３８℃），ｌｏｗｄｅｎｓｉｔｙ（５．８６ｇ／ｃｍ３），ｈｉｇｈｍｏｄｕｌｅ（２９４ＧＰａ）ａｎｄｈｉｇ... 详细信息

１ＩＮＴＲＯＤＵＣＴＩＯＮＮｉＡｌａｌｏｙｗｉｔｈａＢ２ｓｔｒｕｃｔｕｒｅｈａｓａｈｉｇｈｍｅｌｔｐｏｉｎｔ（１６３８℃），ｌｏｗｄｅｎｓｉｔｙ（５．８６ｇ／ｃｍ３），ｈｉｇｈｍｏｄｕｌｅ（２９４ＧＰａ）ａｎｄｈｉｇｈｈｅａｔｃｏｎｄｕｃｔｉｏｎｃｏ...

关键词： NiAl grain boundary structure computer simulation

ATOMISTIC SIMULATION OF POINT DEFECTS IN NiAl ALLOY

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中国有色金属学会会刊：英文版 1997年第2期7卷 129-132页

作者： Liu, Zhenyun lin, dongliang Chen, Da Shanghai Jiao Tong Univ Shanghai China

ＡＴＯＭＩＳＴＩＣＳＩＭＵＬＡＴＩＯＮＯＦＰＯＩＮＴＤＥＦＥＣＴＳＩＮＮｉＡｌＡＬＬＯＹ①ＬｉｕＺｈｅｎｙｕｎ，ＬｉｎＤｏｎｇｌｉａｎｇ，ＣｈｅｎＤａＤｅｐａｒｔｍｅｎｔｏｆＭａｔｅｒｉａｌｓＳｃｉｅｎｃｅ，Ｓｈａｎ... 详细信息

ＡＴＯＭＩＳＴＩＣＳＩＭＵＬＡＴＩＯＮＯＦＰＯＩＮＴＤＥＦＥＣＴＳＩＮＮｉＡｌＡＬＬＯＹ①ＬｉｕＺｈｅｎｙｕｎ，ＬｉｎＤｏｎｇｌｉａｎｇ，ＣｈｅｎＤａＤｅｐａｒｔｍｅｎｔｏｆＭａｔｅｒｉａｌｓＳｃｉｅｎｃｅ，ＳｈａｎｇｈａｉＪｉａｏＴｏｎｇＵｎｉｖｅ...

关键词： NiAl intermetallic point defects computer simulation

达格列净联合二甲双胍治疗老年2型糖尿病患者的效果

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中国民康医学 2024年第6期36卷 27-30页

作者：徐万先林东亮莆田九十五医院健康管理中心福建莆田351100 莆田九十五医院呼吸内科福建莆田351100

目的:观察达格列净联合二甲双胍治疗老年2型糖尿病(T2DM)患者的效果。方法:选取2021年3月至2023年4月该院收治的96例老年T2DM患者进行前瞻性研究,按照随机数字表法将其分为观察组和对照组各48例。对照组采用二甲双胍治疗,观察组在对照... 详细信息

目的:观察达格列净联合二甲双胍治疗老年2型糖尿病(T2DM)患者的效果。方法:选取2021年3月至2023年4月该院收治的96例老年T2DM患者进行前瞻性研究,按照随机数字表法将其分为观察组和对照组各48例。对照组采用二甲双胍治疗,观察组在对照组基础上联合达格列净治疗,两组均持续治疗12周。比较两组临床疗效,治疗前后血糖指标[空腹血糖(FPG)、餐后2 h血糖(2hPG)、糖化血红蛋白(HbA1c)]水平、炎性指标[同型半胱氨酸(Hcy)、白细胞介素-6(IL-6)、肿瘤坏死因子-α(TNF-α)、C反应蛋白(CRP)]水平、氧化应激指标[丙二醛(MDA)、超氧化物歧化酶(SOD)、谷胱甘肽过氧化物酶(GSH-Px)]水平,以及不良反应发生率。结果:观察组治疗总有效率为93.75%(45/48),高于对照组的79.17%(38/48),差异有统计学意义(P0.05)。结论:达格列净联合二甲双胍治疗老年T2DM患者可提高治疗总有效率,降低血糖指标和炎性指标水平,改善氧化应激指标水平,效果优于单纯二甲双胍治疗。

关键词：老年 2型糖尿病达格列净二甲双胍血糖炎性因子氧化应激

孟鲁司特钠联合布地奈德福莫特罗治疗老年慢性阻塞性肺疾病患者的效果

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中国民康医学 2024年第7期36卷 41-43,47页

作者：林东亮徐万先莆田九十五医院呼吸内科福建莆田351100

目的:观察孟鲁司特钠联合布地奈德福莫特罗治疗老年慢性阻塞性肺疾病(COPD)患者的效果。方法:选取2020年5月至2022年5月该院收治的300例老年COPD患者进行前瞻性研究,按照随机数字表法将其分为对照组和观察组各150例。两组均给予常规治疗... 详细信息

目的:观察孟鲁司特钠联合布地奈德福莫特罗治疗老年慢性阻塞性肺疾病(COPD)患者的效果。方法:选取2020年5月至2022年5月该院收治的300例老年COPD患者进行前瞻性研究,按照随机数字表法将其分为对照组和观察组各150例。两组均给予常规治疗,在此基础上,对照组给予布地奈德福莫特罗治疗,观察组在对照组基础上联合孟鲁司特钠治疗,两组均治疗14 d。比较两组临床疗效,治疗前后肺功能指标[第1秒用力呼气容积(FEV1)、用力肺活量(FVC)、FEV1/FVC]水平、血气分析指标[动脉血氧分压(PaO_(2))、动脉血二氧化碳分压(PaCO_(2))、动脉血氧饱和度(SaO_(2))]水平、炎性指标[降钙素原(PCT)、C反应蛋白(CRP)、白细胞介素-6(IL-6)]水平,以及不良反应发生率。结果:观察组治疗总有效率为98.67%(148/150),高于对照组的90.67%(136/150),差异有统计学意义(P0.05)。结论:孟鲁司特钠联合布地奈德福莫特罗治疗老年COPD患者可提高治疗总有效率、肺功能指标水平,改善血气分析指标水平,降低炎性指标水平,效果优于单纯布地奈德福莫特罗治疗。

关键词：慢性阻塞性肺疾病布地奈德福莫特罗孟鲁司特钠肺功能血气分析指标炎性指标不良反应

MOLECULAR STATIC SIMULATION OF ENERGY FEATURESOF INTERACTION BETWEEN GRAIN BOUNDARYAND DISLOCATIONS IN Ni＿3Al ALLOY

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中国有色金属学会会刊：英文版 1994年第3期4卷 67-70,76页

作者： Chen, Da Lu, Min lin, dongliang Shanghai Jiao Tong Univ Shanghai China

ＭＯＬＥＣＵＬＡＲＳＴＡＴＩＣＳＩＭＵＬＡＴＩＯＮＯＦＥＮＥＲＧＹＦＥＡＴＵＲＥＳＯＦＩＮＴＥＲＡＣＴＩＯＮＢＥＴＷＥＥＮＧＲＡＩＮＢＯＵＮＤＡＲＹＡＮＤＤＩＳＬＯＣＡＴＩＯＮＳＩＮＮｉ＿３ＡｌＡＬＬＯＹＣｈｅｎ，Ｄ... 详细信息

ＭＯＬＥＣＵＬＡＲＳＴＡＴＩＣＳＩＭＵＬＡＴＩＯＮＯＦＥＮＥＲＧＹＦＥＡＴＵＲＥＳＯＦＩＮＴＥＲＡＣＴＩＯＮＢＥＴＷＥＥＮＧＲＡＩＮＢＯＵＮＤＡＲＹＡＮＤＤＩＳＬＯＣＡＴＩＯＮＳＩＮＮｉ＿３ＡｌＡＬＬＯＹＣｈｅｎ，Ｄａ；Ｌｕ，Ｍｉｎ；Ｌｉｎ，Ｄｏｎｇ...

关键词： Ni3Al Intermetullics grain boundary structure dislocation computer simulation

COMPUTER SIMULATION OF DISLOCATION CORES IN B2 NIAL INTERMETALLICS

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Journal of Central South University 1999年第1期11卷 5-8页

作者： Zhenyun Liu Baiyun Huang dongliang lin 1. Powder Metallurgy Research Institute Central South University of Technology 410083 Changsha China 2. School of Materials Science & Engineering Shanghai Jiaotong University 200030 Shanghai China

Using embedded atom method and molecular static relaxation method, the core structure of , edge dislocations, screw dislocation, the interaction between point defects and edge dislocation in NiAl intermetallics were investigated. The results show that edge dislocation expands along and orientation on the (001) slip plane. The core structure of edge dislocation on (001) plane is like a 'butterfly', while it is very compact when it lies on {110} slip plane. So NiAl will have a {110} slip system in stead of {100} slip system, as experiments showed. edge dislocation has a more expanded core structure and the atoms of dislocation core distort more heavily. None dislocation dissociation was found in the studied dislocations. The outlines of dislocation core structures change very little after a row of point defects are introduced in them, which can be explained by point defects' little effects on the stress field around dislocation core. The results also show that it is hard to change dislocation core structure by decreasing alloy order using the method of introducing limited point defects into the alloy.

关键词： dislocation core structure NiAl computer simulation point defects

SUPERPLASTICITY IN LARGE-GRAINED Fe_3Al ALLOYS

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Acta Metallurgica Sinica(English Letters) 1995年第Z1期8卷 419-429页

作者： lin dongliang(T. L. lin),(SHAN Aidang, CHEN Mingwei Shanghai Jiaotong University, Shanghai 200030, China) Shanghai Jiaotong Univ Shanghai China

The superplasticity behavior of Fe-28Al, Fe-28Al-2Ti, Fe-28Al-4Ti (all composition reported in this paper are in atomic percent) alloys has been investigated by tensile *** microscopy and transmission electron *** test were performed at 700 to 900℃ under a strain rate range of about 10-5/s to 10-2/s. Maximum strain rate sensitivity index m was found to be 0.5 and the largest elongation reached 620%. The flow activation energy was measured to be 263kJ/mol for Fe-28Al and 191kJ/ mol for Fe-28Al-2Ti, which are much lower than the creep activation energy generally observed in Fe3Al alloys. After deformation grain size became much finer from about 100 μm to 20-30μ*** combined with TEM observations, we suggested that a continuous recrystallization process took place and superplasticity may arise from this process.

关键词： superplasticity Fe_3Al alloy large grains

MICROSTRUCTURE AND DUCTILITY OF RE DOPED RAPIDLY SOLIDIFIED NiAl

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Acta Metallurgica Sinica(English Letters) 1995年第2期8卷 106-109页

作者： SUN Baode lin dongliang YANG Gencang ZHOU Yaohe 1)Shanghai Jiao Tong University, Shanghai,China)2)Northwesten Polytechnic University,Xi’an,China Shanghai Jiaotong Univ Shanghai China

The paper investigated the effects of RE on the microstructure and ductility of melt-spun Al-63.3at.%Ni and Al-66.4at%*** Al-63.3at.%Ni without RE the microstructure is a mixture of equiaxed martensitic grains and B2 NiAl grains,but after addition of 0.2wt% RE a complete supersaturated B2 NiAl results,and its elongation is enhanced from 0.9%(without RE) to 1.4%(with 0.2wt%RE).For Al-66.4at.%Ni without RE the microstructure is coarse equiaxed martensitic grains with Ni3Al precipitated at the *** complete martensitic grains and supersaturated single phase,B2 NiAl,would result with addition of 0.05wt%RE and 0.2-0.8wt%RE *** elongation of Al-66.4at.%Ni without RE is only 0.8%.With the addition of 0.05, 0.2 and 0.8wt%*** elongation can reach 2.6,3.0 and 3.2% *** addition of RE can change the fracture mode from intergranular fracture(without RE) to a mixture of intergranular and transgranular fracture or entirely transgranular *** mechanisms of microstructure formation and ductility enhancement are analyzed.

关键词： NiAl rare earth element rapidly solidified alloy ductility