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The results confirm that the surface morphology of materials under LSP can reflect the deformation mechanism and it can be a new method of studying the deformation mechanism of materials under LSP.
The microstructure and deformation mechanism of metallic materials under LSP is one of the focuses.
Kumar, et al: Materials and Design Vol. 54 (2014), p. 734-741
Zhang, et al.: Materials Science and Engineering: A Vol. 528 (2011), p. 4783-4788
Dai, et al.: Journal of manufacturing science and engineering Vol. 131 (2009), p. 054503

Although the FA lapping and polishing posses an obvious advantages in processing efficiency when machining brittle and hard materials, its processing mechanism remains unclear and its processing parameters are still in the exploratory stage.
References [1]Akselrod M S, Bruni F J: Journal of Crystal Growth, 2012, 360: 134-145
[3] Hader B, Weis O: Surface Science, 1989, 220(1): 118-130
[6]Lv B H, Yuan J L, Yao Y X, Wang Z W: Materials Science Forum. 2006, 532: 460-463
[9]Zhu H, Niesz D E, Greenhut V A, Sabia R: Journal of materials research, 2005, 20(2): 504-520.

P-Least Squares Method of Curve Fitting Lemin Gu College of Materials Science and Engineering Tongji University, Shanghai, China gulemin@tongji.edu.cn Keywords: Least Squares method, Chebyshev; Optimal Approximation; Curve fitting Abstract.
This method is introduced by some examples unified in the materials science, the chemical engineering and the life body change. 1 Introduction Least Squares (LS) method independently published by French mathematician Legendre (A.M.Legendre,1752—1833) in 1805, and by German mathematician Gauss (C.F.Gauss,1777—1855) in 1809, is the most widely used in mathematical statistics today.
In materials science, chemical engineering, bio-engineering, involving a large number of experiments and data processing, calculation of LS method because of its convenient and effective making it the most commonly used method.
Numerical Mathematics A Journal of Chinese Universities (soon publishes)
JOURNAL OF SHANDONG INSTITUTE OF LIGHT INDUSTRY.Vol.17 (2003), p.51-55

It is one of the important materials which relates to motor energy conversion and service life.
Japanese Journal of Applied Physics. 1987, 26(1):197-199
Wear Properties and Life Prediction of Friction Materials for Ultrasonic Motors.
A Wear Evaluation Chart if Friction Materials Used for Ultrasonic Motors.
Wear and dynamic properties of piezoelectric ultrasonic motor with frictional materials coated stator, Materials Chemistry and Physics, 2005, 90:391~395 [7] Ding Qingjun.

Influences of Preparation Process on the Orientation and Properties of PZT Piezoelectric Thick Film Generation Materials YU Guo-qin1,a, SHAO Yu-ying1,b, LIU Jun-biao2,c, HUO Rong-ling2,d, Li Yan-li2,e, DUAN Zhong-xia2,h* 1.
Shanghai Municipal Electric Power Company, Shanghai 200025, China 2．Institute of Electrical Engineering Chinese Academy of Sciences Beijing 100190, China ayugq@sh.sgcc.com.cn, byyshao@163.com, cliujb@mail.iee.ac.cn, dhuorongling@mail.iee.ac.cn, eliyanli20102010@163.com, *fduanzhongxia@mail.iee.ac.cn Keywords: (100) orientation; PZT generation material; ferroelectric properties; dielectric properties; piezoelectric properties Abstract: As it’s excellent mechanical and electrical conversion characteristics, Piezoelectric material has become an important material for capturing environmental mechanical energy to get electrical energy.
In the piezoelectric materials, PZT is a kind of widely used inorganic inon-metallic functional materials with excellent piezoelectric, pyroelectric and ferroelectric properties [2].
Zeng, “Energy conversion system with piezoelectric ceramic,” Journal of Jilin University(Engineering and Technology Edition), Vol. 38, No. 2, pp. 344-348, March 2008
Cao, “ Oriented Growth of PZT thick f ilm embedded with PZT nanoparticles,” Journal of Harbin Institute of Technology (New Series), Vol. 16, pp. 232-236, 2009 [14] A.

Comparing with classical homogeneous materials, stress concentration at the inner surface of hollow cylinder composed of functionally graded materials can be alleviated.
For functionally graded materials, the elastic ultimate bearing capacity can be improved strikingly by increasing the thickness of cylinder, which is not so obvious for classical homogeneous materials.
Functionally graded materials (FGM) are new advanced composite materials with continuously varying properties in one or multi directions.
Acknowledgement The study is supported by the National Natural Science Foundation of China (Grant no. 50874047).
AIAA Journal Vol. 46(2008), p. 2050

Sample materials sorted by material thickness are shown in Table 1.
International journal of solids and structures, 46(11-12), (2009) 2493-2505
International Journal of Computer Integrated Manufacturing, 31(8), (2018) 777-784
Packaging Technology and Science, 31(5), (2018) 369-376
Nordic Pulp & Paper Research Journal, 30(2), (2015) 336-343

Journal of Applied Polymer Science Vol. 93 (2004), p. 948 [5] R.
Journal of Applied Polymer Science Vol. 80(2001), p. 863 [6] Yujun Song, et al.
Journal of Applied Polymer Science Vol. 101(2006), p. 3781 [7] Guodong Liang, et al.
Journal of Applied Polymer Science Vol. 91(2004), p. 3054 [8] Limin Tai, et al.
Journal of Applied Polymer Science Vol. 80(2001), p.415

This paper is devoted to the parts formation from composite materials in the process of selective laser melting.
Approaches and Equipment Investigated materials.
Mechanical tests results Material 03Cr17Ni12Mo2 03Cr17Ni12Mo2+1TiC 03Cr17Ni12Mo2+3TiC Yield strength, [MPa] 526± 16 579 ± 9 731 ± 14 Temporary tensile strength, [MPa] 625 ± 20 705 ± 7 849 ± 15 Elongation, [%] 32 ± 2.6 29 ± 2.4 21 ± 2.9 In materials science, it is well known that the material strengthening is usually achieved due to plasticity.
Materials 2018, 11, 13181–131812
Materials 2018, 11, 2356

Journal of Materials Processing Technology, 2006, 177: 396～400 [2] Eriksson M, Oldenburg M, Somani MC, et al.
Metallurgical and Materials Transactions, May 2009, 40A: 1160
Journal of Materials Processing Technology, 2006, 177: 452～455
Journal of Materials Processing Technology, 2005, 164(7)：1294-1300 [11] Jacobs P F.
New frontiers in mold construction: high conductivity materials and conformal cooling channels[J].