310 Optimum processing condition for The Local Diameter Enlargement Processing in steel pipes

2008 ◽  
Vol 2008.46 (0) ◽  
pp. 101-102
Keyword(s):  
Processing Condition ◽  
Steel Pipes ◽  
Optimum Processing ◽  
Optimum Processing Condition ◽  
Local Diameter

High Temperature Deformation Behavior of Strip-Cast AZ31 Mg Alloy

2006 ◽  
Vol 15-17 ◽  
pp. 461-466
Author(s):  
B.H. Lee ◽  
Won Kyu Bang ◽  
Sang Ho Ahn ◽  
Chong Soo Lee
Keyword(s):  
High Temperature ◽  
Processing Map ◽  
Microstructural Analysis ◽  
Processing Condition ◽  
Mg Alloy ◽  
Temperature Deformation ◽  
Maximum Efficiency ◽  
Optimum Processing ◽  
Az31 Mg Alloy ◽  
Strip Cast

In this study, optimum processing conditions for strip-cast AZ31 Mg alloy was investigated on the basis of processing map and microstructural analysis. To obtain the processing map, isothermal compression tests were carried out to a strain of 0.5 at temperatures of 200 ∼ 400°C with the strain rates of 0.01 ∼ 10s-1. It was found that maximum efficiency indicating the optimum processing condition occurred at 300°C and 10s-1. The possible deformation mechanisms operating at high temperature was also discussed.

scholarly journals Optimasi Proses Pembuatan Mi Sorgum Dengan Menggunakan Ekstruder Ulir Ganda (Optimization of Sorghum Noodle Processing with Twin Screw Extruder)

1970 ◽  
Vol 3 (1) ◽  
pp. 1-7
Author(s):  
Tjahja Muhandri ◽  
Subarna Subarna ◽  
Ivan Mustakim
Keyword(s):  
Response Surface Methodology ◽  
Optimum Condition ◽  
Processing Condition ◽  
Cooking Loss ◽  
Optimum Process ◽  
Twin Screw Extruder ◽  
Screw Extruder ◽  
Screw Speed ◽  
Twin Screw ◽  
Optimum Processing Condition

The objective of this research was to optimize the sorghum noodle processing with two variables i.e. extruder temperature (80, 85, 90oC) and screw speed (10, 15, 20 Hz). The optimum process was chosen by using Response Surface Methodology (RSM), based on 2 parameters, i.e. cooking loss and elongation. The result of this research showed that the optimum processing condition with desirability of 0.736, was resulted from the combination of the extruder temperature of 85oC and screw speed of 20 Hz. The verification showed that the sorghum noodles from this optimum condition had cooking loss of 11.87 %, and elongation of 234.84.  Keywords: noodle, sorghum, optimization, twin screw extruder, RSM

Optimized Processing Condition for a Photocrosslinkable Stable Nonlinear Optical Polymer

1990 ◽  
Vol 214 ◽  
Author(s):  
Jun Y. Lee ◽  
Woo H. Kim ◽  
Braja K. Mandal ◽  
Jayant Kumar ◽  
Sukant K. Tripathy
Keyword(s):  
Nonlinear Optical ◽  
Processing Condition ◽  
Polymeric System ◽  
Nonlinear Optical Material ◽  
Optical Polymer ◽  
Temperature Rate ◽  
Set Up ◽  
Vinyl Cinnamate ◽  
Nonlinear Optical Polymer ◽  
Optimum Processing Condition

ABSTRACTThe optimum processing condition for a photocrosslinking Nonlinear Optical(NLO) polymeric system was established. Parameters such as change in heat capacity at glass transition temperature, rate of decrease of absorbance of residual uncrosslinked chromophores, and measurement of mass loss upon heating were used to set up the optimum condition. Poly(vinyl cinnamate) was used as the photocrosslinkable polymer and 3- cinnamoyloxy-4-[4-(N, N-diethylamino)-2-cinnamoyloxy phenyl azo] nitrobenzene was used as the NLO molecule. Poling at 70°C for 5 minutes followed by photocrosslinking with a dose of 2.5 mW/cm 2 for 10 minutes results in a stable second order nonlinear optical material.

Experimental Study of Glass Ceramics from Liquid Hematite Slag

2011 ◽  
Vol 194-196 ◽  
pp. 2082-2085
Author(s):  
Yi Miao Nie ◽  
Fu Sheng Niu ◽  
Jin Xia Zhang
Keyword(s):  
Processing Condition ◽  
Glass Ceramics ◽  
Ecological Environment ◽  
Crystallization Time ◽  
Land Resources ◽  
Microcrystalline Structure ◽  
Severe Damage ◽  
X Ray ◽  
Save Energy ◽  
Optimum Processing Condition

Much slag occupied the land resources and caused severe damage to the ecological environment. A lot of work has been done on the reclaimation and utilization of slag. The composition, type and characteristics of slag were similar in some way to glass ceramics, which are architectural decoration materials or wearable and corrosion-proof materials with high quality and low price. In this paper, glass ceramics was prepared using hematite slag, which has not been cooled down in order to save energy. The optimum processing condition determined by orthogenesis test to prepare glass ceramics was hematite78.16%, CaF23.91%, CaO7.77%, coke10.16%.The smelting temperature is 1550 for 60 min and the crystallization time is 90 min. Microstructure analysis was studied by SEM. The microcrystalline structure was many petals, which was diopside crystal proved by X-ray analysis.

scholarly journals Physicochemical properties, kinetics and thermodynamic studies of polyphenol oxidase from sorghum (Sorghum bicolor (L.) Moench) for potential use in industry

2019 ◽  
Vol 18 (2) ◽  
pp. 102-117
Author(s):  
Toluwase Hezekiah Fatoki ◽  
David Morakinyo Sanni
Keyword(s):  
Sorghum Bicolor ◽  
Polyphenol Oxidase ◽  
Processing Condition ◽  
Residual Activity ◽  
Processing Parameters ◽  
Size Exclusion ◽  
Average Value ◽  
Exclusion Chromatography ◽  
Optimum Processing Condition ◽  
Potential Use

Abstract Advances Polyphenol Oxidase (PPO) from Sorghum bicolor (white and yellow varieties) grains were investigated for optimum processing condition. The partially purified enzyme was obtained from two varieties of Sorghum bicolor by step-wise separation through ion-exchange and size-exclusion chromatography. The final purification gave a yield of 7.33 % and 12.3 % for PPO from white and yellow sorghum respectively. The PPO has Vmax and Km of 2.66 U.mL−1 and 19.72 mM for white sorghum, 1.33 U.mL−1 and 12.92 mM for yellow sorghum. The optimal pH of PPO activity was found at pH 4 and pH 7 for white and pH 4 and pH 8 for yellow sorghum. The pKa 7.4 and 8.7 were obtained for PPO from white sorghum, and pKa 5.4, 7.4 and 8.5 for yellow sorghum. The PPO residual activity were above 70 % at 5 hours of incubation within the neutral pH ranges for white sorghum, while those of yellow sorghum were below 40 %. The optimum temperature of 40 ºC and 30 ºC for white and yellow sorghum PPO respectively. The average value of enthalpy (ΔH), entropy (ΔS) and Gibbs free energy (ΔG) obtained at 20 min of incubation and temperature 50 – 80 °C were respectively 49.03 kJ.mol−1, - 129.52 J.mol−1.K−1, and 92.81 kJ.mol−1 for white sorghum PPO, and 90.1 kJ.mol−1, - 9.29 J.mol−1.K−1, and 93.37 kJ.mol−1 for yellow sorghum PPO. Zn2+, Fe2+ and ascorbic acid inhibited PPO while Cu2+, Na+ and K+ activated the enzyme. The results suggest the processing parameters for controlling PPO in potential industrial application of white and yellow sorghum grains.

scholarly journals Investigation on laser welding of Ti-6Al-4V plates in corner joint

2017 ◽  
Vol 9 (1) ◽  
pp. 168781401668554 ◽  
Author(s):  
Fabrizia Caiazzo ◽  
Vittorio Alfieri ◽  
Antonello Astarita ◽  
Antonino Squillace ◽  
Giuseppe Barbieri
Keyword(s):  
Laser Beam ◽  
Cross Section ◽  
Laser Beam Welding ◽  
Processing Condition ◽  
International Standards ◽  
Thick Plates ◽  
Joint Configuration ◽  
Aerospace Applications ◽  
Specific Device ◽  
Optimum Processing Condition

The article deals with laser beam welding of Ti-6Al-4V plates for aerospace applications. A number of trials are conducted to weld 3-mm-thick plates in corner joint configuration; a specific device for clamping and shielding to prevent oxidation is used. Autogenous welding is investigated, the joint being accessed from the outside, as a butt-welded corner joint. Referring to international standards, the results are first discussed in terms of geometry of the welding bead in the cross-section since titanium alloys are reported to be notch sensitive. Moreover, microstructure and microhardness are investigated. An optimum processing condition is suggested in order to perform laser beam welding with minimal undercut and porosity.

Tendencies of export and import of steel industry products of Russia within 9 months of 2019

2020 ◽  
Vol 76 (2) ◽  
pp. 107-112
Author(s):  
N. G. Zinov’eva
Keyword(s):  
Middle East ◽  
Steel Industry ◽  
Pig Iron ◽  
Finished Steel ◽  
Steel Pipes ◽  
Ferrous Metals ◽  
Steel Grades ◽  
Cis Countries ◽  
Further Development ◽  
Coated Sheet

Structure of the Russian export and import of steel industry products presented by results of 9 months of 2019 operation. It was shown, that the total share of pig iron, ferroalloys and semi-products (40.3%) in the ferrous metals export from Russia is practically the same as the share of rolled products and steel pipes (39.4%), whereas the shares in the import structure were 7.7 and 75% accordingly. The share the far abroad countries in the Russian export and import of finished steel products (in natural terms) accounted for 80.6 and 28.7% accordingly, while the share of CIS countries – 19.4 and 71.3% accordingly. For 9 months of 2019 the Russian export of semi-products declined by 10.9% comparing with the analogue period of 2018 and accounted for 10.9 m tons. 54.6% of the total export shipping of semi-products were directed to Mexico, Turkey, Egypt and Taiwan. Within the nearest years the Russian export of semi-products and billets, in particular, will be effected by the further development of the semi-products production in in the countries of Middle East, Turkey, Vietnam and India. The domestic market remained to be more attractive for many Russian companies. For the 9 months of 2019, export of long and flat products accounted for 3 and 5.7 m tons accordingly, declining comparing with the analogue period of the previous year by 11 and 15.6% accordingly. Import of long and flat products decreased by 12 and 0.5%, accounting for 1.0 and 2.9 m tons accordingly. By the results of 9 months of 2019, import declined and export shipping of coated sheet increased. Taking into account the expansion of steel grades assortment by Russian plants, increase of capacities for production of sheet with different coatings, this tendency is likely to remain.

Failure Analysis Of Buried Gas Pipelines Crossing Seismic Faults

2020 ◽  
Vol 3 (2) ◽  
pp. 781-790
Author(s):  
M. Rizwan Akram ◽  
Ali Yesilyurt ◽  
A.Can. Zulfikar ◽  
F. Göktepe
Keyword(s):  
Ground Deformation ◽  
Warning System ◽  
Strike Slip ◽  
Gas Pipelines ◽  
Steel Pipes ◽  
Seismic Fault ◽  
Fault Parameters ◽  
Dip Angle ◽  
Permanent Ground Deformation ◽  
Recent Earthquakes

Research on buried gas pipelines (BGPs) has taken an important consideration due to their failures in recent earthquakes. In permanent ground deformation (PGD) hazards, seismic faults are considered as one of the major causes of BGPs failure due to accumulation of impermissible tensile strains. In current research, four steel pipes such as X-42, X-52, X-60, and X-70 grades crossing through strike-slip, normal and reverse seismic faults have been investigated. Firstly, failure of BGPs due to change in soil-pipe parameters have been analyzed. Later, effects of seismic fault parameters such as change in dip angle and angle between pipe and fault plane are evaluated. Additionally, effects due to changing pipe class levels are also examined. The results of current study reveal that BGPs can resist until earthquake moment magnitude of 7.0 but fails above this limit under the assumed geotechnical properties of current study. In addition, strike-slip fault can trigger early damage in BGPs than normal and reverse faults. In the last stage, an early warning system is proposed based on the current procedure. 

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