Property Control in Production of Aluminum Sheet by Use of Simulation

There is carried out a number of experiments with the purpose of analyzing SOTS impact upon both finishing productivity, and physical-chemical state and tribological behavior of surfaces machined, and also a possibility for creation according to the results of the investigations carried out a relatively universal micro-emulsion SOTS based on existing in the Ukraine the line of oils, PAV, corrosion inhibitors, alloying additives etc. As SOTS samples there were used both well-known compouds, for example, Camix, Nope Right (USA), and carbamide having in its structure boron, boron-phosphorus-containing additive, water-solvable phosphate, tributyl phosphate (oil-solvable), concentrate SOTS tribol, having in its structure compounds of boron, nitrogen and phosphorous; ethylic ether of fatty acids; methyl ether of colza oil; Sarkozyl-O having in its structure easily-decomposable chlorine compounds. From the results obtained it is possible to draw a conclusion that during finishing in the environment of water-compatible SOTS an important role in the formation of the properties of the surface worked is played by hydrocarbon components and additives which contribute to the formation of the thinnest surface layers modified with carbon and oxygen.

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Toughness Property Control by Nb and Mo Additions in High-Strength Quenched and Tempered Boron Steels

Metals ◽

10.3390/met11010095 ◽

2021 ◽

Vol 11 (1) ◽

pp. 95

Author(s):

Irati Zurutuza ◽

Nerea Isasti ◽

Eric Detemple ◽

Volker Schwinn ◽

Hardy Mohrbacher ◽

...

Keyword(s):

Solid Solution ◽

Transition Temperature ◽

High Strength ◽

Unit Size ◽

Tempered Martensite ◽

Size Refinement ◽

Direct Quenching ◽

Property Control ◽

The Impact ◽

Impact Transition Temperature

The synergetic effect on hardenability by combining boron with other microalloying elements (such as Nb, Mo and Nb + Mo) is widely known for high-strength medium carbon steels produced by direct quenching and subsequent tempering treatment. The improvement of mechanical properties could be reached through optimization of different mechanisms, such as solid solution hardening, unit size refinement, strain hardening, fine precipitation hardening and the effect of carbon in solid solution. The current study proposes a procedure for evaluating the contribution of different microstructural aspects on Charpy impact toughness. First, the effect that austenite conditioning has on low-temperature transformation unit sizes and microstructural homogeneity was analysed for the different microalloying element combinations. A detailed crystallographic characterization of the tempered martensite was carried out using electron backscattered diffraction (EBSD) in order to quantify the effect of unit size refinement and dislocation density. The impact of heterogeneity and presence of carbides was also evaluated. The existing equations for impact transition temperature (ITT50%) predictions were extended from ferrite-pearlite and bainitic microstructures to tempered martensite microstructures. The results show that microstructural refinement is most beneficial to strength and toughness while unit size heterogeneity has a particularly negative effect on ductile-to-brittle transition behaviour. By properly balancing alloy concept and processing, steel having a yield strength above 900 MPa and low impact transition temperature could be obtained by direct quenching and tempering.

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Simultaneous structure and luminescence property control of barium carbonate nanocrystals through small amount of lanthanide doping

Science Bulletin ◽

10.1016/j.scib.2017.09.002 ◽

2017 ◽

Vol 62 (18) ◽

pp. 1239-1244 ◽

Cited By ~ 2

Author(s):

Jianmin Gu ◽

Zhenpan Bian ◽

Baipeng Yin ◽

Cuihong Jin ◽

Xin Liu ◽

...

Keyword(s):

Luminescence Property ◽

Barium Carbonate ◽

Lanthanide Doping ◽

Property Control

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Forming limit analysis for two-stage forming of 5182-O aluminum sheet with intermediate annealing

International Journal of Plasticity ◽

10.1016/j.ijplas.2012.10.004 ◽

2013 ◽

Vol 45 ◽

pp. 21-43 ◽

Cited By ~ 54

Author(s):

Jingjing Li ◽

John E. Carsley ◽

Thomas B. Stoughton ◽

Louis G. Hector ◽

S. Jack Hu

Keyword(s):

Limit Analysis ◽

Aluminum Sheet ◽

Forming Limit ◽

Intermediate Annealing ◽

Two Stage

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Texture clustering and long-range disorientation representation methods: application to 6022 aluminum sheet

Metallurgical and Materials Transactions A ◽

10.1007/s11661-002-0243-x ◽

2002 ◽

Vol 33 (12) ◽

pp. 3709-3718 ◽

Cited By ~ 7

Author(s):

P. S. Lee ◽

H. R. Piehler ◽

A. D. Rollett ◽

B. L. Adams

Keyword(s):

Long Range ◽

Aluminum Sheet

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Constraints and limitations of concrete 3D printing in architecture

Journal of Engineering Design and Technology ◽

10.1108/jedt-11-2020-0456 ◽

2021 ◽

Vol ahead-of-print (ahead-of-print) ◽

Author(s):

Chien-Ho Ko

Keyword(s):

3D Printing ◽

Manufacturing Process ◽

Computer Aided Design ◽

Research Approach ◽

Layer By Layer ◽

Content Type ◽

Improve Design ◽

Study Results ◽

Computer Aided ◽

Property Control

Purpose Additive manufacturing of concrete (AMoC) is an emerging technology for constructing buildings. However, due to the nature of the concrete property and constructing buildings in layers, constraints and limitations are encountered while applying AMoC in architecture. This paper aims to analyze the constraints and limitations that may be encountered while using AMoC in architecture. Design/methodology/approach A descriptive research approach is used to conduct this study. First, basic notions of AMoC are introduced. Then, challenges of AMoC, including hardware, material property, control and design, are addressed. Finally, strategies that may be used to overcome the challenges are discussed. Findings Factors influencing the success of AMoC include hardware, material, control methods, manufacturing process and design. Considering these issues in the early design phase is crucial to achieving a successful computer-aided design (CAD)/computer-aided manufacturing (CAM) integration to bring CAD and CAM benefits into the architecture industry. Originality/value In three-dimensional (3D) printing, objects are constructed layer by layer. Printing results are thus affected by the additive method (such as toolpath) and material properties (such as tensile strength and slump). Although previous studies attempt to improve AMoC, most of them focus on the manufacturing process. However, a successful application of AMoC in architecture needs to consider the possible constraints and limitations of concrete 3D printing. So far, research on the potential challenges of applying AMoC in architecture from a building lifecycle perspective is still limited. The study results of this study could be used to improve design and construction while applying AMoC in architecture.

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