材料期刊网

Hot Deformation Behavior of Nickel-Based Superalloy GH4720

Li QU Jing-long , BI Zhong-nan , DU Jin-hui , WANG Min-qing , WANG Qing-zeng , ZHANG Ji

钢铁研究学报(英文版)

The hot deformation characteristics of GH4720Li alloy were studied at the temperature of 1100-1170 ℃ and strain rate of 001-1 s-1 using Gleeble hot compression tests. True stress-true strain curves and deformation microstructures were investigated. Constitutive equati...

关键词: hot deformation , GH4720Li alloy , constitutive equation , processing map

Evolution of microstructure and mechanical property during long-term aging in Udimet 720Li

材料科学技术（英文）

Thermal stabilities of microstructure and mechanical property have been investigated on superalloy U720Li, which is of great interest of application for jet engine and land-based turbine disc. The results showed that, the primary and secondary gamma' particles maintain...

关键词: gamma'

Evolution of microstructure and mechanical property during long-term aging in Udimet 720Li

Lanzhang ZHOU , Valentino LUPINC , Jianting GUO

材料科学技术（英文）

Thermal stabilities of microstructure and mechanical property have been investigated on superalloy U720Li, which is of great interest of application for jet engine and land-based turbine disc. The results showed that, the primary and secondary gamma' particles maintain...

关键词:

Longitudinal magnetotransport in long-period semiconductor superlattices

Physical Review B

Longitudinal electron transport is investigated for a long-period semiconductor superlattice in the presence of a magnetic field applied along the growth direction of the superlattice. It is shown that the longitudinal magnetoresistance exhibits a complicated dependenc...

关键词: magnetoresistance

LONG-TERM CREEP AND RUPTURE PROPERTIES OF HEAT RESISTING STEELS AND ALLOYS

K.Yagi and F.Abe (National Research Institute for Metals , 1-2-1 Sengen , Tsukuba 305-0047 , Japan)

金属学报(英文版)

The present status of NRIM Creep Data Sheet Project and the recent activities of long-term creep and rupture studies on heat resisting steels are described. The project has been continued to produce long-term data such as 100 000h-creep r...

关键词: heat resisting steel and alloy , null , null

THRESHOLD OF SHORT FATIGUE CRACK FOR Al-Li ALLOY 8090

CHEN Zheng Northwestern Polytechnical University , Xi′an , China Lab.No.401 , Northwestern Polytechnical University , Xi′an 710072

金属学报(英文版)

Threshold of fatigue for short through cracks for Al-Li alloy 8090 was evaluated to be lower than that of long cracks,and to decrease with the shortening of the crack length.The correla- tion among the threshold,crack wake,and crack tip s...

关键词: Al-Li alloy , null , null , null , null

ADSORPTION OF LI ON Mo(110) SURFACE: A FIRST-PRINCIPLES STUDY

Surface Review and Letters

Periodic, self-consistent, density functional theory calculations have been performed to investigate Li adsorption on Mo(110) surface. It turns out that the long-bridge site is the most stable site and the Li

关键词: Density functional theory;Mo;Li;work function;structural-properties;hydrogen adsorption;alkali-metals;work;function;anomalies;cesium;mo;sb;pseudopotentials;spectroscopy

Evolution of Microstructure and Mechanical Property during Long-Term Aging in Udimet 720Li

材料科学技术（英文）

关键词:

Twinning in Intermetallic Compounds Are Long Shear Vectors and/or Shuffles Really Necessary?

F.M.Chu David P.Pope Dept.of Materials Science and Engineering , University of Pennsylvania , Philadelphia , PA 19104 , USA

材料科学技术（英文）

In this paper the geometric description and general theory of mechanical twinning are reviewed, the twins in general lattices and superlattices are summarized, and the kinetic process by which mechanical twins form is revisited. A case study of mechanical twinning of HfV2+Nb, (cubic) Laves phase, is...

关键词: twin , null , null , null

A NEW METHOD FOR MEASURING LONG-TERM CREEP DEFORMATION IN A SMALL REGION

J.M. Gong , S.T. Tu , J. Xia and X. Ling (School of Mechanical Engineering , Nanjing University of Chemical Technology , Nanjing 210009 , China)

金属学报(英文版)

Creep deformation localization is generally found in structures at high temperamture,typically in weldments. As the heat affected zone (HAZ) in a weldment is very narrow, deformation in HAZ region can hardly be measured by conventional displacement gauge. A new method for measuring

关键词: creep deformation , null , null , null