Search results

Some Considerations Regarding Micro Hardness of Parts Manufactured from 316-L Steel Using SLM Technology BUICAN George-Răzvan1,a, OANCEA Gheorghe1,b, LANCEA Camil1,c and POP Mihai Alin2,d 1Department of Manufacturing Engineering, Transilvania University of Brasov, Mihai Viteazu 5, 500174, Brașov, Romania 2Faculty of Materials Science and Engineering, Transilvania University of Brasov, Colina Universității nr. 1, 500036, Brașov, Romania abuican.george@unitbv.ro, bgh.oancea@unitbv.ro, ccamil@unitbv.ro, dmihai.pop@unitbv.ro Keywords: additive manufacturing, selective laser melting, 316-L steel, micro hardness.
Selective laser melting process Introduction Additive manufacturing represents various processes for making a three-dimensional object of almost any shape from a 3D model or other digital data source primarily through additive processes in which successive layers of material are laid down under computer control [1].
Micro hardness mark left on SLM part Micro indentation hardness test, is a hardness test using a calibrated machine to force a diamond indenter of specific geometry into the surface of the material being evaluated (Fig. 9.), in which the test forces are 9.807x10-3 to 9.807 N (1 to 1000 gf) and the indentation diagonal, or diagonals are measured with a light microscope after load removal.
Shi, Effect of molten pool boundaries on the mechanical properties of selective laser melting parts, Journal of Materials Processing Technology 214, (2014), 2660-2667
[11] ASTM-E384-10, Standard Test Method for Knoop and Vickers Hardness of Materials, revised in March 2010.

Materials and Methods (a) Materials: the sewage sludge, Fermentation accelerant agent and increased nutrient agent are from Maoming city of Guangdong province.
In this study, the materials are easily degraded straw, leaves, dried chicken manure and so on. 3.2, About problems of how to make the organic matter content reach the maximum in the Composting In sample 6 of our experiment, that is the sludge plus 40% Fermentation accelerant agent treatment, the highest organic matter content of compos has been occurred.
The Literature [7] pointed out that the organic matter content of the sludge is lower than that of corn stalks, the lower contribution rate of carbon increase ,the relatively lower proportion of sludge organic matter content of mixed materials, the experimental results were Similar with the view in literature[7].
Journal of Northwest Agricultural University (Natural Science), 2009 (06): 22 [7] Kang Jun.

Effect of Boron Addition and Sintering Atmosphere on Precipitation in Sintered Fe-Mo-C Steels Nattaya Tosangthum1,a, Prapas Kunnam1,b, Monnapas Morakotjinda1,c, Wantana Koetniyom2,d, , Rungtip Krataitong1,e, Pongsak Wila1,f and Ruangdaj Tongsri1,g* 1Particulate Materials Processing Technology Laboratory (PMPT), National Metal and Materials Technology Center, 114 Paholyothin Road,Khlong Nueng, Khlong Luang,Pathum Thani 12120, Thailand 2Department of Industrial Physics and Medical Instrumentation (IMI), Faculty of Applied Science, King Mongkut University of Technology North Bangkok, Bangkok 10800, Thailand anattayt@mtec.or.th, bprapask@mtec.or.th, cmonnapm@mtec.or.th, dwantana.k@sci.kmutnb.ac.th. erungtipk@mtec.or.th, fpongsakw@mtec.or.th, and g*ruangdt@mtec.or.th Keywords: Sintering, ferrite, carbide, boride, sinter hardening Abstract.
Boron (B) addition is widely applied to iron based materials for enhancing sinterability.
Lindsley, Influence of chemical composition and austenitizing temperature of hardenability of PM steels, Advances in Powder Metallurgy and Particulate Materials, MPIF, New Jersey, USA, 2009
The Journal of The Southern African Institute of Mining and Metallurgy 113 (2013) 67-72

Lewis, The Atom and the Molecule, Journal of the American Chemical Society, New York (1916)
Pauling, The Nature of the Chemical Bond, Journal of the American Chemical Society, New York (1931)
Martinez, in The Journal of Physical Chemistry A, Ab Inizio Multiple Spawning Dynamics Multi-State Second-Order Perturbation Theory, Washington (2009)
Konno, Advanced Material Science and Engineering of Carbon, Editors: Michio Inagaki Feiyu Kang, (2013)
Belenkov, Structure of fluorographene and its polymorphous varieties, Journal of Physics: Conference Series 1124 (2018) 022010, (2018).

Design effect is bound to conform to the material and spiritual, damage the environment project does not accord with the basic principles of modern architecture, apparently the previous evaluation system is not up to a higher standard.
Around in downtown Chongqing, Hubei's Yichang early building more focused on the embodiment of the medium and small civil architecture, functional innovation of public facilities; Public buildings in environmental protection material and characteristics of technology, the modeling of historic and cultural blocks highlight the characteristics of local characteristics.
Yet the museum named national museum of the first level, become the largest in the three gorges region demonstration base of popular science education.
[4] Shunke Wang: The three gorges reservoir area mountain of efficient ecological agriculture industrial clusters (Journal of southwest agricultural university, 2001)
[7] Weizhong Wang: urban river ecological restoration handbook (social sciences academic press, 2008)

The Risk Assessment and Control Technology to Engineering Schedule Wang Xiao-yan 1,a , Liang Ting 1,b and FAN Shao-yan 2,c awannxy@163.com, b402275323@qq.com ,c249373419@qq.com 1 School of Civil Engineering, Chang’an University, Xi’an, China 2 College of Urban and Environment Science, Northwest University, Xi’an，China Keywords: engineering construction; scheduled plan; indeterminacy factors; risk assessment; risk control Abstract.
For instance, investment cost overrun, construction period delay, the production capacity less than design requirement, raw material prices rise, labor costs increase, product price volatility, changes in market demand, interest rate and foreign exchange rate changes, etc, could make an investment project fail to achieve the desired economic results, even losses.
They do not make the approval procedures timely for the construction project, and do not provide some simple temporary facilities to complete the venues, or three side connections and one site leveling, which could facilitate post-construction for contractors, and facilitate the contractors to deliver construction machines and construction materials to the construction site.
Shanxi Architecture, 2007, (8) [3] Qiao Lin eds: Construction Risk of Constructional Engineering and Insurance, Shanghai: Shanghai Science and Technology Literature Press
Dynamic Analysis on Project Risk Control, Architectural Engineering Journal of Shenyang Institute. 1998, 4, 14(2)

We consider that the low-dimensional iron compounds should be a promising material for exotic electrical conduction phenomena, such as a CDW and a HTCS.
This large defective troilite is an interesting material in terms of the site-preference of Fe and V, the role of vanadium for stabilization of the troilite structure, the magnetic interaction between the layers.
The defective troilite phase is an antiferromagnetic material and the spin-flip transition temperature is lowered by the defect concentration.
Acknowledgement This work was partly supported by matching found subsidy for private universities from MEXT (Ministry of Education, Culture, Sports, Science and Technology, Japan).
(Japanese journal) [10] F.Keller-Besrest and G.Collin, J.Solid State Chem.

They are the most universal additional material which is completely combustible jointly with fuel.
Methods and Materials In this paper an experimental study of the morphology of heterogeneous systems water / surfactant / CNT were carried out for the two most common types of surfactants: anionic (sodium dodecyl sulfate, SDS, Sigma, C12H25SO4Na) and cationic (cetyltrimethylammonium bromide, CTAB, Merck, C19H42BrN) with a molar mass of 288.38 g/mol and 364.45 g/mol, respectively.
Makarova, Nanomaterial effect study in the viscosity characteristics of fuel oil and alternative fuels used at fuel and energy complex enterprises, Journal of Engineering and Applied Sciences, 11 (2016) 2950-2954
Marom, The role of surfactants in dispersion of carbon nanotubes, Advances in Colloid and Interface Science, 128-130 (2006) 37-46

Denyer2,d 1Biosensor and Bioengineering Laboratory, Microelectronics and Nanotechnology-Shamsuddin Research Center (MiNT-SRC), Universiti Tun Hussein Onn Malaysia, 86400 Parit Raja, Batu Pahat, Johor, Malaysia. 2School of Life Sciences, University of Bradford, BD7 1DP, Bradford, United Kingdom asoon@uthm.edu.my, bm.a.g.genedy@gmail.com, cm.youseffi@bradford.ac.uk, dm.denyer@bradford.ac.uk Keywords: Osteosarcoma, keratinocytes, cell traction force, liquid crystal, cell force sensor.
Materials and Methods Human bone cell line MG-63 (osteoblast-like cells), originally isolated from human osteosarcoma were used in the study and they were acquired from European Collection of Cell Cultures (ECACC) from a 14-year old male patient.
By using liquid crystal as an adhesion substrate, it can be used a reference material to probe the traction forces of various cells.
International Conference of Biomedical Engineering and Sciences, IEEE-EMBS, Langkawi, Malaysia, 2012
Clark, Cutaneous wound healing, The New England Journal of Medicine, (1999) 738-746

Beyond these regions, the pyrolysis of the materials continued with slower rate and lose in weight are stopped, which tends to saturate in temperature range between 625-1000oC for the resins BMR and NMR, being in the temperature more than 1000oC for resin (NR).
Beyond these temperature, the pyrolysis and the weight loss of the materials continued slowly.
Fan, “Effect of praseodymium on catalytic graphitization of furan resin carbon”, Journal of Rare Earths, 28,1, pp 69-71 (2010)
Jianguo, “Catalytic graphitization of carbon/carbon composites by lanthanum oxide”, Journal of Rare Earths, 30,2, pp 128-132 (2012)
Pritchard, “Developments in Reinforced Plastics-1, Resin Matrix Aspects”, Applied Science publishers LTD London, 7 (1980)