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RESEARCH ON MULTI-STEPS TUBE-COMPRESSION OF THIN-WALL PARTS WITH VARIABLE DIAMETER BY VISCOUS PRESSURE FORMING Zhong-jin Wang1, a, Ji-guang Li2,b and Hai-lan Gong3,c 1, 2School of Materials Science and Engineering, Harbin Institute of Technology Harbin 150001, China 3Deng Yun College of science and technology KunShan 215300, China awangzj@hit.edu.cn, bjiguangli2008@126.com, c375254230@qq.com Key words: viscous medium pressure forming; tube-compression; variable diameter parts; numerical simulation Abstract.
This forming method can also be used in tube-compression of high strength materials and can realize precise plastic forming of parts with high strength, thin-wall and large diameter variation ratio.
Journal of Materials Processing Technology. 1998, (80-81): 695~699 [8] WANG Zhongjin, WANG Zhongren.
Journal of Plasticity Engineering. 1999, 6(3): 46~48 [9] Z.
Journal of Materials Processing Technology. 2004, 151: 80~87 [10] FANG Kunfang, HUANG Ying.

Diatomite or diatomaceous earth (DE) is one of the materials which can be used as an adsorbent to treat waste water polluted with heavy metal ions.
Introduction Diatomaceous earth (DE) is used in many industrial fields: wastewater treatment, filtering, petroleum processing, cleaning product manufacture, manufacture of fire or heat resistant materials and additives for building materials, etc. [1-9].
Materials and Methods Raw DE from Lam Dong province was ground in ceramic ball mill for 30 min, demagnetized to remove iron, and passed through a 90 µm sieve.
The experiments were conducted at Materials Laboratory, Ho Chi Minh City University of Food Industry.
Asian Journal of Materials Science. 2 (2010) 121-136

Chen [2] investigated the optimal thickness ratio of the constraining layer and the constrained layer for fixed materials of three layers.
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This approach forces the engagement of modern science and technology in the field of metallurgy, materials science and metal working.
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Materials, 2024. 17(15): p. 3826
Materials Science and Engineering: A, 2025: p. 149099
Journal of Materials Research and Technology, 2024. 28: p. 3765-3774
Journal of Materials Engineering and Performance, 2024: p. 1-19
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The Young's modulus and Poisson's ratio of the material is E and 0.25, respectively.
Acknowledgements The financial support from National Natural Science Foundation of China (No. 50578147) is greatly acknowledged.
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Zhou: The Boundary Element Method and Its Applications in Structural Analysis (Anhui Science and Technology Press, China 2006)

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Journal of Materials processing Technology, 1998, 82 (1): 145-155
JOURNAL OF PLASTICITY ENGINEERING, 2004, 11(3): 64-67.
JOURNAL OF PLASTICITY ENGINEERING, 2007, 14(6): 59-62.

Influence of Aging on Microstructure and Mechanical Properties of Wrought Magnesium Alloys Yong Xue 1, a, Zhimin Zhang 1, b, Lihui Lang 2, c, Hui Yang 1, d 1 North University of China, School of Material Science and Engineering, 030051 Taiyuan, China 2 Beihang University, School of Mechanical Engineering and Automation, 100191 Beijing, China amerryjukii@hotmail.com, bzhangzhimini@nuc.edu.cn, cforge54@163.com, dping8191@sohu.com Keywords: aging, microstructure, mechanical properties, AZ80 magnesium alloy, ZK60 magnesium alloy Abstract.
Experimental materials and methods Mg-8.9wt%Al-0.53wt%Zn alloy and Mg-(5.0-6.0) wt%Zn-(0.3-0.9) wt%Zr alloy ingots with an outer diameter of 300mm are adopted as the materials for experiment.
Firstly, intercept along the axial direction from the ingot a piece of slab with a thickness of 15mm as sample material.
Acknowledgements The present research is sponsored by National Natural Foundation of China (No.50735005, No.50605059), Shanxi Provincial Science Foundation for Youths of China (No.2007021026), and Development for Science and Technology in Higher Educational Institutes (No. 20081027).
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In this study, the soil to be tested against the waste materials is fine soil.
Bureau of Reclamation and American Society for Testing and Materials).
Types of waste for the production of pozzolanic materials –.
Construction and Building Materials, 23(7), pp.2641–2646. (2009) [10] U.
Soil Science, 24, pp.365–372. (1927)

Knyazeva 1,2,b 1Institute of Strength Physics and Materials Science of Siberian Branch Russian Academy of Sciences, 634055, Tomsk, Russia 2Tomsk Polytechnic University, 634050, Tomsk, Russia achya@ispms.tsc.ru, banna@ispms.tsc.ru Keywords: mathematical model, thermal protective coating, multilayer composite Abstract.
Additionally thermal resistances are inhomogeneous due to curved surfaces of materials.
In the work [10], a numerical model combining radiation and conduction for porous materials was developed based on the finite volume method.
Frolov, Heat Destruction of Materials.
J. of Thermal Sciences 72 (2013) 47–59