Effect of Lanthanum on Mechanical Properties of ZL702 Alloy at Room and High Temperature Condition

Effect of Lanthanum on Mechanical Properties of ZL702 Alloy at Room and High Temperature Condition     

SURFACE MODIFICATION ON STEEL BY RARE EARTH AND LASER TREATMENT

ＳＵＲＦＡＣＥＭＯＤＩＦＩＣＡＴＩＯＮＯＮＳＴＥＥＬＢＹＲＡＲＥＥＡＲＴＨＡＮＤＬＡＳＥＲＴＲＥＡＴＭＥＮＴ①ＳｈｅｎＹｉｆｕ１，２，ＦｅｎｇＺｈｏｎｇｃｈａｏ１，ＣｈｅｎＪｉｚｈｉ１，ＬｉａｎｇＹｏｎｇ１１ＩｎｓｔｉｔｕｔｅｏｆＭｅｔａｌＲｅｓｅａ...     

Tensile properties and fracture behavior of Ti_2AlNb based alloys at room temperature

1　ＩＮＴＲＯＤＵＣＴＩＯＮＴｈｅｃｌａｓｓｏｆｏｒｔｈｏｒｈｏｍｂｉｃｔｉｔａｎｉｕｍａｌｕｍｉｎｉｄｅａｌｌｏｙｓｃｕｒｒｅｎｔｌｙａｐｐｅａｒｓｔｏｏｆｆｅｒｅｘｃｅｌｌｅｎｔｐｏｔｅｎｔｉａｌａｓａｅｒｏｓｐａｃｅａｎｄｅｌｅｖａｔｅｄｔｅｍｐｅｒａｔｕｒｅｓｔｒｕｃｔｕｒａｌｍａｔｅｒｉａｌｓｂｅｃａｕｓｅｏｆｔｈｅｉｒｌｏｗｄｅｎｓｉｔｙａｎｄｈｉｇｈｓｔｒｅｎｇｔｈ[1,2].ＴｈｅｃｏｎｖｅｎｔｉｏｎａｌＴｉ3ＡｌｂａｓｅｄａｌｌｏｙＴｉ24Ａｌ11Ｎｂｐｏｓｓｅｓｓｅｓｈｉｇｈｅｒｔｏｕｇ…     

High temperature oxidation of powder metallurgy two phase Cu Cr alloys under low oxygen pressure

1　ＩＮＴＲＯＤＵＣＴＩＯＮＭａｎｙｓｔｒｕｃｔｕｒａｌｍａｔｅｒｉａｌｓｆｏｒｈｉｇｈｔｅｍｐｅｒａｔｕｒｅａｐｐｌｉｃａｔｉｏｎｓｃｏｎｔａｉｎｔｗｏｏｒｍｏｒｅｍｅｔａｌｌｉｃｐｈａｓｅｓ,ｓｕｃｈａｓＮｉｏｒＣｏｂａｓｅｓｕｐｅｒａｌｌｏｙｓ,ａｎｄｈａｖｅｄｉｆｆｅｒｅｎｔｃｏｒｒｏｓｉｏｎｂｅｈａｖｉｏｒｓｗｉｔｈｒｅｓｐｅｃｔｔｏｔｈｅｃｏｍｍｏｎｓｉｎｇｌｅｐｈａｓｅａｌｌｏｙ[1].ＣｕＣｒａｌｌｏｙｓａｒｅｉｄｅａｌｓｙｓｔｅｍｓｔｏｓｔｕｄｙｈｉｇｈｔｅｍｐｅｒａｔｕｒｅｃｏｒｒ…     

Thermodynamics of effect of modification on microstructure of Al-Si alloy melt

1　ＩＮＴＲＯＤＵＣＴＩＯＮＭｏｄｉｆｉｃａｔｉｏｎｏｆｐｈａｓｅＳｉｈａｓｂｅｅｎｕｓｅｄｗｉｄｅｌｙａｓａｎｅｆｆｅｃｔｉｖｅｗａｙｔｏｉｍｐｒｏｖｅｔｈｅｐｒｏｐｅｒｔｉｅｓｏｆＡｌＳｉａｌｌｏｙ.Ｂｕｔｔｈｅｓｔｕｄｉｅｓｏｎｔｈｅａｃｔｉｎｇｂｅｈａｖｉｏｒｏｆｍｏｄｉｆｉｃａｔｉｏｎｅｌｅｍｅｎｔｓｉｎｔｈｅａｌｌｏｙｈａｖｅｎｏｔｂｒｏｋｅｎａｗａｙｆｒｏｍｔｈｅｅｘｐｅｒｉｍｅｎｔａｌｐａｔｔｅｒｎ,ｉｎｗｈｉｃｈｔｈｅｍｏｄｉｆｉｃａｔｉｏｎｅｆｆｅｃｔｗａｓｅｖａｌｕａｔｅｄｏ…     

Formation and decay of neutron—deficient nuclei Po and Pb

ＦｏｒｍａｔｉｏｎａｎｄｄｅｃａｙｏｆｎｅｕｔｒｏｎｄｅｆｉｃｉｅｎｔｎｕｃｌｅｉＰｏａｎｄＰｂＣｈｅｎＸｕｅＳｈｉ１，２，ＡｈｍａｄＩ３，ＡｎｄｒｅｙｅｖＡＮ４，ＢａｔｃｈｅｌｄｅｒＪＣ７，ＢｉｊｎｅｎｓＮ４，ＢｉｎｇｈａｍＣＲ２，５，Ｂｌｕｍ...     

Development of Hydrocracking Catalyst to Produce High Quality Clean Middle Distillates

A novel hydrocracking Ni-W binary catalyst was tentatively designed and prepared by means of impregnation on mixed supports of modified Y zeolite and amorphous aluminosilicate. The structure and properties of catalyst were extensively characterized by XRD, NH3-TPD, IR and XRF techniques. The performance of catalyst was evaluated by a 100-ml hydrogenation laboratory test unit with two single-stage fixed-bed reactors connected in series. The characterization results showed that the catalyst has a developed and concentrated mesopores distribution, suitable acid sites and acid strength distribution, and uniform and high dispersion of metal sites. Under a high conversion rate of 73.8% with the ＞350℃ feedstock, a 98. 1m% of C5 yield and 83.5% of middle distillates selectivity were obtained. The yield of middle distillates boiling between 140℃and 370℃ was 68.70m% and its quality could meet the WWFC category Ⅲ specification. It means that this catalyst could be used to produce more high quality clean middle distillates derived from heavy oil hydrocracking. The potential aromatic content of heavy naphtha from 65℃ to 140℃ was 37.5m%. The BMCI value of ＞370℃ tail oil was 6.6. The heavy naphtha and tail oil are premium feedstocks for catalytic reforming and steam cracker units.     

Study on parameters of L-[1-^13C]phenylalanine breath test for quantitative assessment of liver function in healthy subjects and patients with hepatitis B virus-related liver disease

1 Introduction Hepatitis B virus-related liver disease is the most common hepatopathy around the world, especially in developing countries like China, which brings more and more increasing healthy and social burden. To measure liver function accurately is critical for moni-toring the progression of liver dysfunction; evaluating the effect of treatment; predicting long term prognosis and risk of surgical interventions and optimal timing of liver transplant. But in clinic, there are few routine…     

Study on stable delivery of charged uniform droplets for freeform fabrication of metal parts

Electrostatic delivery of charged uniform metal droplets is a novel method to deposit metal parts with short process period and low cost. But the delivery process is unstable and delivery accuracy of charged droplets deteriorates because of actions of mutual interactions of closely charged droplets. A droplet generator with droplet charging and deflecting system has been established to find out the way for stably and accurately deflecting droplets. The parameters for generating uniform droplets were first s...     

Super-orthogonal space-time code design based on the trellis diagram integrated operation

By studying the super-orthogonal space-time coding designs for 2 transmit antennas and superquasi orthogonal space-time coding designs for 4 transmit antennas,a novel super-orthogonal space-time coding design for 4 transmit antennas is proposed.By exploiting the inherent structure association between OSTBC and QOSTBC,the proposed schemes can obtain the full-rate and good performance while keeping the coding complexity as super-orthogonal space-time coding schemes for 2 transmit antennas.Simulation results d...