scholarly journals Influence of silicon and manganese content on the mechanical properties of Al-Mg-Si alloy sheets with higher iron content

2005 ◽  
Vol 55 (5) ◽  
pp. 222-226 ◽  
Author(s):  
Tadashi MINODA ◽  
Mineo ASANO ◽  
Hideo YOSHIDA
Keyword(s):  
Mechanical Properties ◽  
Iron Content ◽  
Manganese Content

EFFECT OF IRON CONTENT ON MECHANICAL PROPERTIES OF FORGINGS FROM HEAT-RESISTANCE TITANIUM ALLOY VТ41

2015 ◽  
Vol 0 (10) ◽  
pp. 1-1
Author(s):  
O.S. Kashapov ◽  
◽  
T.V. Pavlova ◽  
A.R. Istrakova ◽  
V.S. Kalashnikov ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Titanium Alloy ◽  
Heat Resistance ◽  
Iron Content

The Iron Content of the Human Brain.—II

1938 ◽  
Vol 84 (353) ◽  
pp. 980-984 ◽  
Author(s):  
A. H. Tingey
Keyword(s):  
Human Brain ◽  
Special Reference ◽  
Iron Content ◽  
Manganese Content ◽  
Iron Copper

In a previous paper (1) the iron, copper and manganese content of the human brain were recorded, with special reference to the G.P.I. cortex, which in certain cases contained an excess of both total and “available” (i.e., non-hæmatin) iron.

Refined and Uniform Microstructure with Superior Mechanical Properties in Medium Plate Microalloyed Steel with Reduction in Mn-Content during Ultrafast Cooling

2016 ◽  
Vol 879 ◽  
pp. 2066-2071 ◽  
Author(s):  
Zhao Dong Wang ◽  
Bin Wang ◽  
Yan Mei Li ◽  
Bing Xing Wang ◽  
Guo Dong Wang
Keyword(s):  
Mechanical Properties ◽  
Microalloyed Steel ◽  
Manganese Content ◽  
Plate Thickness ◽  
Ferrite Matrix ◽  
Microalloyed Steels ◽  
Accelerated Cooling ◽  
Low Alloy Steels ◽  
Uniform Microstructure ◽  
Ultrafast Cooling

We describe here the relationship between electron microscopy and mechanical property studies in industrially processed titanium bearing microalloyed steel plates that involved processing using the recently developed ultrafast cooling (UFC) approach. Given that the segregation of manganese is generally responsible for microstructural banding in low-alloy steels, which can deteriorate the tensile property in the direction of thickness, the manganese-content was reduced by ~0.6-0.8% with the objective to obtain uniform microstructure across the thickness of the steel plate. Besides, non-uniform distribution of accelerated cooling along the thickness direction also leads to inhomogeneous microstructure across the plate thickness. In order to obtain near-uniform microstructure and similar mechanical properties from the surface to the center of plate, fast and effective cooling process is necessary. In this regard, refined and uniform microstructure that was free of microstructural banding was obtained via UFC process across the plate thickness, with strict control and faster cooling rate on the run-out table. Furthermore, grain refinement and random precipitation in the ferrite matrix contributed ~100 MPa toward yield strength. The study underscores the potential of processing medium and heavy plates of titanium bearing microalloyed steels plates with uniform and refined microstructure across the thickness via thermo-mechanical controlled processing (TMCP) involving UFC.

Preparation of Al2O3/Al-Si Composites by In Situ Reaction of Fe2O3+MnO2/Al System

2015 ◽  
Vol 816 ◽  
pp. 48-53
Author(s):  
Jing Zhang ◽  
Hua Shun Yu ◽  
Xin Ting Shuai ◽  
Hong Mei Chen ◽  
Guang Hui Min
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Electron Probe ◽  
Room Temperature ◽  
Manganese Content ◽  
Hardness Test ◽  
Test Results ◽  
Electron Probe Micro Analyzer ◽  
Transmission Electron ◽  
Polygonal Shape

Al2O3 particles reinforced ZL109 composites were prepared by in-situ reaction between Fe2O3+MnO2 and Al in this paper. The influence of ratio of Mn to Fe on the morphologies of Al-Si-Mn-Fe phase and mechanical properties of the composites was investigated. The microstructure was studied by electron probe micro-analyzer (EPMA) and transmission electron microscopy (TEM). The results show that the Al2O3 particles displaced by the Fe2O3+MnO2/Al system are in nanosize. The acicular Al-Si-Fe phases change from acicular to polygonal shape and become smaller with the increase manganese content. The hardness test results have no big difference on the composites. However, the ultimate tensile strength at room temperature and 350°C enhance evidently with the increasing of Mn/Fe.

Properties and Microstructure of Mullite-Based Iron Nanocomposite

2006 ◽  
Vol 317-318 ◽  
pp. 611-614 ◽  
Author(s):  
Hao Wang ◽  
Tohru Sekino ◽  
Takafumi Kusunose ◽  
Tadachika Nakayama ◽  
Koichi Niihara
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Solid Solution ◽  
Iron Content ◽  
Room Temperature ◽  
Iron Nanoparticles ◽  
Sol Gel ◽  
Granular Structure ◽  
High Iron Content ◽  
Oxide Solid Solution

Mullite-based iron nanocomposites were prepared by the reduction of a mullite-iron oxide solid solution and successive hot pressing. The solid solution was obtained from the heat treatment of diphasic gel by sol-gel method. Some of the α-iron nanoparticles have an intra-granular structure just after reduction. Mechanical properties are strongly affected by the content of iron. Low iron content is beneficial to strengthening while high iron content can improve the fracture toughness. Furthermore, the nanocomposites also behave ferromagnetic properties at room temperature.

scholarly journals Influence of cooling rate on microstructure development of AlSi9MgMn alloy

2020 ◽  
pp. 36-36
Author(s):  
Davor Stanic ◽  
Zdenka Zovko-Brodarac
Keyword(s):  
Mechanical Properties ◽  
Cooling Rate ◽  
Eutectic Reaction ◽  
Primary Dendrite ◽  
Manganese Content ◽  
Thermal Analyses ◽  
Chinese Script ◽  
Dendrite Network ◽  
3Si2 Phase

Aluminum alloys are widely applied in automotive, aircraft, food and building industries. Multicomponent technical AlSi9MgMn alloy is primarily intended for high cooling rate technology. Controlled addition of alloying elements such as iron and manganese as well as magnesium can improve mechanical and technological properties of final casting in dependence from cooling conditions during solidification. The aim of this investigation is characterization of AlSi9MgMn alloy microstructure and mechanical properties at lower cooling rates than those for which this alloy was primarily developed. Thermodynamic calculation and thermal analyses revealed solidification sequence in correlation to microstructure investigation as follows: development of primary dendrite network, precipitation of high temperature Al15(Mn,Fe)3Si2 and Al5FeSi phases, main eutectic reaction, precipitation of intermetallic Al8Mg3FeSi6 phase and Mg2Si as a final solidifying phase. Influence of microstructure features investigation and cooling rate reveals significant Al15(Mn,Fe)3Si2 morphology change from Chinese script morphology at low, irregular broken Chinese script morphology at medium and globular morphology at high cooling rate. High manganese content in AlSi9MgMn alloy together with high cooling rate enables increase of Fe+Mn total amount in intermetallic Al15(Mn,Fe)3Si2 phase and encourage favourable morphology development, all resulting in enhanced mechanical properties in as-cast state.

scholarly journals Mapping of Soil Micronutrients (Fe, Mn, Cu, Zn) in the Transition Zone of Northwestern Foothill of Shivaliks of Kathua District Using GIS

2020 ◽  
pp. 115-121
Author(s):  
Vishaw Vikas ◽  
K. R. Sharma ◽  
Vikas Sharma ◽  
Vivak M. Arya ◽  
Rajeev Bharat
Keyword(s):  
Transition Zone ◽  
Iron Content ◽  
Copper Content ◽  
Manganese Content ◽  
Zinc Content ◽  
Mean Value ◽  
Surface Soils ◽  
Study Region ◽  
Composite Surface ◽  
Available Zinc

Aim: To analyze and map the soil micronutrient status in the transition zone of NW foothills of Shivaliks of Kathua Region using GIS. Methodology: Composite surface soil samples from two hundred and six (206) locations distributed randomly due to undulated topography across the whole of the district were collected at the depth of 0-15 cms using global positioning system (GPS). Inverse distance weighting (IDW) technique was adopted to generate prediction maps of the soil properties. The process of digitization and generation of maps was carried out with ArcGIS 10.3. Results: After soil sample analysis, the available copper content in the soil of hilly areas varies from 0.4 to 14.4 mg kg-1 with a mean value of 3.75 mg kg-1. Available Zinc content ranged from 0.25 to 5.60 mg/kg respectively. The available Manganese content of the surface soils varied between 5.60 to 78.10 mg kg-1 with a mean value of 23.97 mg kg-1. Available Iron content ranged from 11.30 to 92.00 mg/kg with a mean value of 38.57 mg kg-1. The available copper content in the soil of plain areas varies from 2.08 to 34.90 mg kg-1 with a mean value of 8.94 mg kg-1. The minimum and maximum values of available copper content lies in higher range. Available Zinc content ranged from 0.25 to 5.60 mg kg-1 respectively. According to the map, available zinc is visualized lowest in plains due to raised soil pH. The available manganese content of the surface soils varied between 2.500 to 57.40 mg/kg with a mean value of 27.03 mg kg-1. Available Iron content ranged from 0 to 66.10 mg kg-1 with a mean value of 41.68 mg kg-1. Conclusion: The mapping was done successfully with micronutrients varying from low to high range. The technique was found to be effective in identifying the micronutrients availability throughout the study region, thereby helping policy makers to frame fertilizer distribution and application policy for future.

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