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Material and Experiments H 300mm×300mm×10mm×15mm (height ×width× web thickness ×flange thickness)V-N micro-alloyed hot-rolled H-section steel with 500MPa yield strength was studied.
When rolling in the unrecrystallized zone, a large number of defects such as sub-grain boundaries, dislocations, and deformation bands are formed in the material.
So when the temperature is lower than a certain value, the instantaneous deformation distribution capacity is the dominant factor affecting the low temperature toughness of the material [11].
Acknowledgement This work is sponsored by Scientific Research and Technology Development Project of China National Petroleum Corporation (No.2019B-4014, 2018E-2101), National Science and Technology Major Project (No.2017ZX05009-003).
Journal of Anhui Vocational College of Metallurgy and Technology, 2017, 27(01):1-48 .

Construction defects could be due to many reasons, such as poor workmanship, design error, or inferior materials [10].
However, its effectiveness depends on the experience and knowledge of the investigator, especially with structural behavior, materials, and construction methods [13].
A review of non-destructive testing methods of composite materials.
Journal of Techno Social, 2(1)
EDP Sciences

WDS monitoring aims at construction execution, monitors the resources occupy status of WDS, including human resources, material resources and equipment resources 3 aspects.
Data Colleting Based on Nodes.Data colleting is an important function of product management information system, it is the base of material transferring and tracking, and it is the data source of other modules.
(5) Flow of equipment & material: Because block construction needs lots of equipment and materials, so key equipment and material has a direct effect to the execution progress of WDS.
If a sustaining tracking for equipment and material cannot be provided, it will be hard for a WDS to meet the scheduled deadline.
Journal of Jiangsu University of Science and Technology, 2010, 24(1):23-26 [5] ZHANG guangfa, Liu Yujun, JI Zhuoshshang etal.

- Reduced maintenance: the higher quality materials and control used in precast concrete increase durability and reduce the need for maintenance. [3] Requirements to Connections Strength - A connection must resist the forces to which is subjected during its lifetime.
Deformation is measured between first yield and ultimate failure of the structural materials used in the connection.
Fire resistance - Connections which may be weakened by exposure to fire should be protected by concrete or grout, enclosed or sprayed with the fire resistance materials.
Cementitious materials such as in-situ mortar, fine concrete or grouting are often used in the joints between load bearing elements in columns and walls as well as for beam and floor elements.
International Journal of Research in Engineering and Technology, No.02, (2015), 767-770

Many objects made of these materials are controlled by the AE method.
Conclusion Experiments with static loading of samples with growing cracks were carried out on enough similar materials.
Builo, On the information value of the method of invariants of acoustic-emission signals in the diagnostics of pre-failure state in materials, J.
Materials Science and Engineering 44 (1980) 267-277
Yuyama, Damage assessment of reinforced concrete beams qualified by acoustic emission, ACI Structural Journal 99(4) (2002) 411-417

To increase the deformability of bulk materials, an electroplastic deformation (EPD) method is applied when an electropulse action provides stimulation of technological plasticity [5].
[3] Brailovski V., Prokoshkin S.D., Khmelevskaya I.Yu. et al.: Materials Transactions JIM (2006), Vol. 47, p. 795
[4] Prokoshkin S.D., Khmelevskaya I.Yu., Dobatkin S.V., Trubitsyna I.B. et al.: Ultrafine Grained Materials IV.
[5] Troitskiy O.A., Baranov J.V., Avraamov J.S., Shljapin A.D.: Physical bases and technologies of processing of modern materials (the theory, technology, structure and properties), Vol.1, Moscow- Izhevsk, Inst.Comput.
[7] Trubitsyna I.B., Prokoshkin S.D., Korotitskiy A.V. et al.: Journal of Functional Materials (2007), Vol. 1, No.2, p.66.

Experimental Works Materials and mix proportions.
Acknowledgement The authors wish to acknowledge the financial support of Korea Science and Engineering Foundation (KOSEF).
[2] American Society for Testing and Materials, Test for Pulse Velocity Through Concrete, ASTM-C-597, (1991)
Johnson, Nondestructive evaluation of early-age concrete strength in plate structures by the impact-echo method, ACI Materials Journal, Vol. 52(1986), p. 297-302
Popovics, Analysis of the concrete strength versus ultrasonic pulse velocity relationship, Materials Evaluation, (2001), No. 2, p. 123-130.

Introduction Over the years, diamond-like thin films, also known as DLC films are of interest to researchers as they have many properties similar to diamonds, such as high mechanical strength, chemical inertness, high optical transmittance and wide energy band. [1] These outstanding features make it a promising material for surface forces like friction, power photovoltaic applications and new electrode materials. [2-3] The core of these properties is that the DLC film consists of a network of sp3 and sp2 coordinates.
Grill, “Diamond-like carbon: state of the art,” Diamond and Related Materials 8, 1999, pp.428-434
Corat, “Adherent Diamond-Like Carbon Coatings on Metals Via PECVD and IBAD,” Brazilian Journal of Physics vol.36, 2006 pp.986-989 [5] F.
Ferrari, “Determination of bonding in diamond-like carbon by Raman spectroscopy,” Diamond and Materials 11, 2002 pp.1053-1061 [10] C.T.
Robertson, “Diamond-like amorphous carbon”, Materials Science and Engineering R37, 2002 pp.129-281 [15] Adliene D, Laurikaitiene J, Kopustinskas V and Meskinis S “Mater Sci Eng 06”, 2008 pp.005

Mongolica Litv.Veneer Xuemei Guan1,a, Minghui Guo2,b 1 Information and Computer Engineering College, Northeast Forestry University, Harbin 150040 2 Key Lab. of Bio-Based Material Science and Technology of Ministry of Education, Northeast Forestry University, Harbin150040, P.R.
Test Material and Measuring Method Test Material.
Test material: Pinus sylvestnis var. mongolica litv..
Table 2 Chromatic characteristic change results of pinus sylvestnis var. mongolica litv. wood before and after dyeing Specimen L* a* b* ∆L* ∆a* ∆b* ∆E* Material Early Wood 83.1 1 3.08 0 21.4 8 Material Late Wood 77.8 0 5.40 0 25.7 0 Dyeing Material Early Wood 28.6 4 32.1 4 12.3 1 Dyeing Material Late Wood 28.6 3 32.2 4 12.4 8 Early Wood Before and After Dyeing -54.47 （-50.61~-60.42） 29.96 （23.70~38.66） -9.172 （-4.23~13.67） 62.84 （58.16~69.28） Late Wood Before and After Dyeing -49.17 （-45.62~-53.33） 26.84 （19.42~35.53） -13.22 （-6.74~18.04） 57.39 （52.78~63.74） Correlation Analysis Among Anatomical Factors of Pinus Sylvestnis Var.
References [1] W.D.Lu: Wood Modification Technology (Northeast Forestry University Press, Harbin 2003) [2] X.F.Duan: Wood Color Controlling Technique (China Building Material Industry Publishing House,Beijing 2007) [3] F.C.Bao and X.F.Duan: Scientia Silvae Sinicae Vol, 36 (2000), p.3 [4] F.C.Bao, Y.K.Zhao and J.X.Lu: Journal of Beijing Forestry University Vol,25( 2003), p.1-5 [5] W.X.Peng and K.F.Li: China Wood Industry Vol,1(2007)

Clough, Critical review of automotive hot-stamped sheet steel from an industrial perspective, Materials Science and Technology (2018) 809-861 [2] Z.
Xu, Effect of Rapid Heating on Microstructure and Tensile Properties of a Novel Coating-Free Oxidation-Resistant Press-Hardening Steel, The Minerals, Metals & Materials Society Vol. 73, No. 11 (2021) 3195-3203 [3] M.
Bach, Optimised press-hardening process using spray cooling – process integrated heat treatment of 22MnB5 sheet metal, HTM Journal of Heat Treatment and Materials vol. 66, no. 6 (2011) 316-322 [4] J.
Mori, Hot Stamping and Press Quenching of Ultrahigh Strength Steel Sheet Using Resistance Heating, Key Engineering Materials (2007) 309-316
Behrens, Coating Materials Under Oxygen-Free Silane Atmosphere for Hot Stamping, Congress of the German Academic Association for Production Technology, WGP: Production at the Leading Edge of Technology (2021) 3-10 [12] F.