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Introduction SLS/SLM is one of the layer-wise material addition techniques that allow generating complex 3D parts by selectively consolidating successive layers of powder material on top of each other, using thermal energy supplied by a focused and computer controlled laser beam[1].
Contours represent the boundaries of solid material within a layer, and are defined by polylines.
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Materials and Highlights (2021); 2:23-28
Journal of Materials Science: Materials in Electronics (2020), 31:1084–1093
Journal of Materials Science: Materials in Electronics (2019), 30: 9444–9454
Structural, FTIR and photoluminescence studies of Cu doped ZnO nanopowders by co-precipitation method Optical Materials. (2012), 34: 1946–1953
Materials Science-Poland, (2017); 35(2), 427-434

a) Material with yield plateau b) Material without yield plateau Fig. 2.
Stress-strain curve for base material Table 3.
“Bolted Connection Tests of Thin G550 and G300 Sheet Steels”, Journal of Structural Engineering, 124(7), 798–808, 1998
“Review on Cold-Formed Steel Connections”, The Scientific World Journal, 2014, 951216, 2014
[20] ISO 6892-1, Metallic materials – Tensile testing – Part 1: Method of test at room temperature, 2019

Experimental Raw materials and mix proportions.
Guo, Sulfate corrosion of concrete with fly ash or slag in saline soil environment, Journal of Xuzhou Institute of Technology (Natural Science Edition). 30(2015) 70-75.
Zhang, Frost resistance of concrete under action of MgSO4 attack, Journal of Building Materials. 5(2011)698-702.
Sun, Effect of sodium sulphate solution on the frost resistance of concrete, Journal of Building Materials. 4(2001)311-316.
Sun, Frost resistance and durability mechanism of concrete under saline-alkali condition in seasonal frozen soil area, Journal of Jilin University: Earth Science Edition. 4(2014)1244-1253.

PREFACE This special issue of the journal contains a collection of technical papers that embrace the topic entitled: "Advances in Understanding the Fatigue Behavior of Materials".
The focus on "Fatigue Behavior of Materials" stems from the changes in properties that occur upon the application of cyclic loads.
Through the time period spanning the last three decades the subject of fatigue behavior of materials has grown to become a major area of scientific and applied research encompassing the disciplines of (a) materials science, spanning the families of metals, ceramics, intermetallics, polymers and their composite counterparts, (b) aerospace engineering, (c) civil engineering, (d) mechanical engineering, (e) biomedical engineering, (f) applied mathematics, and (g) applied physics.
Also assembled are papers that provide an insight of the alternative yet viable approaches to studying and understanding the concept of fatigue of materials.
Srivatsan, FASM, FASME Professor Division of Materials Science and Engineering Department of Mechanical Engineering The University of Akron Akron, Ohio 44325-3903, USA

Depending upon the interaction between the montmorillonite and the polymer, the dispersion of montmorillonite particles in a polymer matrix results in the formation of three types of composite materials .The first type is conventional phase separated composites in which the polymer and the inorganic host remain immiscible resulting in poor mechanical properties of the composite material.
Experimental part Materials and sample preparation Nylon 11 was prepared by our laboratory.
Journal of Applies Polymer Science, Vol.96 (2005) , p.288 [18] B.Yalcin, M.Cakmak.
Journal of Applies Polymer Science, Vol. 42 (2004) , p. 253 [25] Linin Liu, Zongneng Qi, Xiaoguang Zhu.
Journal of Applies Polymer Science, Vol.71 (1999) , p.1133

Key technologies and products will be developed by overcoming the technology of migration and transformation of harmful gas molecules in breeding room, the functional materials and breeding facility for micro-environment control, functionalization of animal health in breeding, and so on.
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H Wang: Animal Husbandry and Feed Science, 2009, 30(2): p. 36 [8] F.
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Ding, et al.: Advanced material research, 2010, 96: p. 289

Among science technology, material, construction, and new ideas in local culture should be combined, so can create new culture, and does not repel technology.
But using the same building materials, not equal to unified format buildings, this does not has contradictory with blending of different cultures.
XIE: Journal of Chongqing Jianzhu University (in Chinese) Vol.30-6(2008), p22
[5] G.Li:Journal of Liaodong University(Natural Sciences) (in Chinese) Vol.15-1(2008), p10
[8] G.Li:Journal of Liaodong University(Natural Sciences) (in Chinese) Vol.16-1(2009), p71.

They are important raw materials for the manufacture of special steel, heat-resisting alloy, corrosion resistant alloy, magnetic alloy and cemented carbide.
Materials and methods Materials.
Wang: Journal of the Mineral, Metals and Materials Society Vol. 58(2006), P. 47 [2] H.
L: Chinese Journal of Chemical Engineering Vol. 18(2010), P. 948 [13] M.
Wang: Journal of Jilin Normal University(Natural Science Edition) Vol. 3(2006), P. 58 [20] T.

Materials and Methods Substrate Preparation.
Journal of the Mechanical Behavior of Biomedical Materials. 57 (2016) 95-108
Materials Science Engineering: C. 31 (2011) 809-814
Journal of Materials Science: Materials in Medicine. 22 (2011) 437-450
Advanced Materials Research.