Investigation of the Relationship between Annealing Temperature and Yield Strength in Cu Film by In Situ XRD Stress Analysis Method

2005 ◽  
Vol 490-491 ◽  
pp. 595-600 ◽  
Author(s):  
M. Qin ◽  
Vincent Ji ◽  
Y.N. Wu ◽  
S.Y. Ma ◽  
J.B. Li
Keyword(s):  
Yield Strength ◽  
Annealing Temperature ◽  
Ion Beam ◽  
Equivalent Stress ◽  
Annealing Treatment ◽  
High Strength ◽  
Proof Stress ◽  
In Situ Xrd ◽  
Cu Film ◽  
The Relationship

A new method is applied to investigate the relationship between the yield strength and annealing temperature for a Cu film. By Ion Beam Assisted Magnetron Sputtering (IAMS), Cu film with 2.4 µm thickness was deposited on a strip of super high strength steel 37SiMnCrNiMoV, and the specimens were treated by vacuum-annealing at different temperature. The X-ray tensile test was used to measure the longitudinal and transverse stresses and applied strain for Cu film. Based on the experimental results, the equivalent stress s and the equivalent uniaxial strain t e can be obtained. According to the s- t e relation, the calculated proof stress is acquired. The results indicate that the proof stress of the film decreases with the increasing of annealing temperature. When annealing temperature rises from 150ı to 300ı, the decreasing amplitude of proof stress is the largest. The phenomenon can be explained by the recrystallization and microstructure evolution in Cu film during the annealing treatment.

scholarly journals The Research and Development of Safety Forewarning Composite Integral Strong Geocell

2015 ◽  
Vol 9 (1) ◽  
pp. 139-145
Author(s):  
Wang Qingbiao ◽  
Zhang Cong ◽  
Wen Xiaokang ◽  
Lü Rongshan ◽  
Xu Lei ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Yield Strength ◽  
Creep Test ◽  
Optimization Technique ◽  
High Strength ◽  
Economic Benefits ◽  
Tensile Yield Strength ◽  
Fiber Technology ◽  
New Type ◽  
The Relationship

In this paper, we have studied the high strength geocell development technology route, analyzed the rules of the tensile properties and creep properties of geocell, and established the relationship between elongation of stress and time, thus providing theoretical foundation for the development and engineering application of the new material. Through theoretical analysis, experimental research and numerical simulation, the characteristics, raw materials and craftsmanship of the geocell have been studied. The research is given on its stress and deformation rules based on elongation test and creep test. The rationality of the experiment is verified through numerical simulation and the conclusions are as follows: (1) With the research on the geocell traditional craftsmanship, combined with new technologies such as special ultrasonic welding technology, intelligent optical fiber technology and fixed locking plate technology, a new-type of safety forewarning high strength geocell can be developed. (2) Based on the geocell material characteristics, the elongation test and creep test are carried out and the tensile yield strength exceeds 250Mpa; the joint is welded by special crafts and the tensile strength ≥2000N/cm. (3) With FLAC3D numerical simulation, simulation study is performed on the mechanical properties of the new cell. Through analyzing the relationship between stress and strain, and time and displacement, the safety design and management construction of the new-type of geocell was proposed based on the actual situation of simulation. (4) The innovation points of the new-type of geocell include: the optimization technique of whole tensile yield strength, fall proof technique of lock parts, and positioning and effective monitoring technique, which effectively solves the geological problems of special projects such as ecological afforestation, sand fixation and high slope soft subgrade, and ensures the quality of the project and has high economic benefits.

scholarly journals Influence of Heat Treatments on Microstructure and Mechanical Properties of Ti–26Nb Alloy Elaborated In Situ by Laser Additive Manufacturing with Ti and Nb Mixed Powder

Materials ◽  
2018 ◽  
Vol 12 (1) ◽  
pp. 61 ◽  
Author(s):  
Jing Wei ◽  
Hongji Sun ◽  
Dechuang Zhang ◽  
Lunjun Gong ◽  
Jianguo Lin ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Additive Manufacturing ◽  
Annealing Temperature ◽  
Annealing Treatment ◽  
High Strength ◽  
Fiber Texture ◽  
Laser Additive Manufacturing ◽  
Mixed Powder ◽  
Microstructure And Mechanical Properties

In the present work, a Ti–26Nb alloy was elaborated in situ by laser additive manufacturing (LAM) with Ti and Nb mixed powders. The alloys were annealed at temperatures ranging from 650 °C to 925 °C, and the effects of the annealing temperature on the microstructure and mechanical properties were investigated. It has been found that the microstructure of the as-deposited alloy obtained in the present conditions is characterized by columnar prior β grains with a relatively strong <001> fiber texture in the build direction. The as-deposited alloy exhibits extremely high strength, and its ultimate tensile strength and yield strength are about 799 MPa and 768 MPa, respectively. The annealing temperature has significant effects on the microstructure and mechanical properties of the alloys. Annealing treatment can promote the dissolution of unmelted Nb particles and eliminate the micro-segregation of Nb at the elliptical-shaped grain boundaries, while increasing the grain size of the alloy. With an increase in annealing temperature, the strength of the alloy decreases but the ductility increases. The alloy annealed at 850 °C exhibits a balance of strength and ductility.

Matrix-Mediated Biomineralization in Marine Mollusks: A Combined Transmission Electron Microscopy and Focused Ion Beam Approach

2011 ◽  
Vol 17 (2) ◽  
pp. 220-225 ◽  
Author(s):  
Martin Saunders ◽  
Charlie Kong ◽  
Jeremy A. Shaw ◽  
Peta L. Clode
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Focused Ion Beam ◽  
Ion Beam ◽  
High Strength ◽  
Organic Matrix ◽  
Dark Field ◽  
Transmission Electron ◽  
Annular Dark Field ◽  
The Relationship

AbstractThe teeth of the marine mollusk Acanthopleura hirtosa are an excellent example of a complex, organic, matrix-mediated biomineral, with the fully mineralized teeth comprising layers of iron oxide and iron oxyhydroxide minerals around a calcium apatite core. To investigate the relationship between the various mineral layers and the organic matrix fibers on which they grew, sections have been prepared from specific features in the teeth at controlled orientations using focused ion beam processing. Compositional and microstructural details of heterophase interfaces, and the fate of the organic matrix fibers within the mineral layers, can then be analyzed by a range of transmission electron microscopy (TEM) techniques. Energy-filtered TEM highlights the interlocking nature of the various mineral phases, while high-angle annular dark-field scanning TEM imaging demonstrates that the organic matrix continues to exist in the fully mineralized teeth. These new insights into the structure of this complex biomaterial are an important step in understanding the relationship between its structural and physical properties and may help explain its high strength and crack-resistance behavior.

Continuous Annealing Process and Microstructure Property of 1200mpa High Strength Steel by Ultrafast Cooling

2014 ◽  
Vol 788 ◽  
pp. 351-356 ◽  
Author(s):  
San Chuan Yu ◽  
Ren Bo Song ◽  
Qi Feng Dai ◽  
Zhe Gao
Keyword(s):  
Tensile Strength ◽  
Yield Strength ◽  
Cooling Rate ◽  
Room Temperature ◽  
Annealing Temperature ◽  
High Strength ◽  
Continuous Annealing ◽  
Experimental Steel ◽  
Steel Increase ◽  
Ultrafast Cooling

The different dilatometric curves of continuous cooling transformation have been determined by DIL805 thermal mechanical simulate, through metallographic and hardness method to study the effect of different cooling rate on the microstructure of transition. The critical point Ac1 and Ac3 of the tested steel are 709°C and 865°C. With the increase of cooling rate, the hardness of the steel and the content of martensite increase. In the laboratory conditions, the steel in this experiment was heated to 780°C, 800°C, 820°C, 840°C and 860°C, for 80s, then slowly cooled to 680°C, and water quenched to room temperature finally. The aging temperature was 240°C for 300s, and the last the sample was air cooled to room temperature. The results show that the microstructure of the annealed experimental steel belongs to martensite and ferrite. With the increase of annealing temperature, the content of martensite, the tensile strength and yield strength of the experimental steel increase, and the elongation decreases continuously. The sample was annealed at 800°C for 80s, then slowly cooled to 680°C and finally water quenched to room temperature. After overaging at 240°C, the samples were obtained with high mechanical properties. The tensile strength, yield strength and elongation are 1223MPa, 605MPa and 9.2%, respectively.

Influence of Yield Strength of Ti-Alloy Liner on Crater Diameter Formed by Shaped Charge Jet Penetration

2017 ◽  
Vol 263 ◽  
pp. 30-37 ◽  
Author(s):  
Jian Guo ◽  
Yong He ◽  
Qiang Qiang Xiao ◽  
Zheng Xiang Huang ◽  
Ya Ping Tan
Keyword(s):  
Yield Strength ◽  
High Strength ◽  
Ti Alloy ◽  
Theoretic Analysis ◽  
Aperture Diameter ◽  
Liner Material ◽  
Relationship Of ◽  
Shaped Charge Jet ◽  
The Relationship ◽  
Good Agreement

In order to study influence of yield strength of liner on aperture diameter when liner material has high strength, the initial aperture and final aperture diameter were analyzed by considering yield strength of liner material. The relationship of aperture diameter with liner strength changing was obtained. The experiments using Ti alloy liner with different yield strength penetrated into concrete were performed. The results shown that, the average aperture diameter of Ti alloy liner which the yield strength is 785MPa is about 1.16 times bigger than that of copper liner which the yield strength is 870MPa. It has good agreement with theoretic analysis. With liner strength increasing, the aperture diameter decreased, and this increasing is more significant with jet velocity decreasing. With respecting to the high-density copper liner, the influence of yield strength on aperture diameter is more sensitive for low-density Ti alloy liner.

Influence of Annealing Temperature on the Antibacterial Activities and Photoactivity of N-Doped TiO2 Films by Ion Beam Assistance

2011 ◽  
Vol 189-193 ◽  
pp. 1258-1262 ◽  
Author(s):  
Xiao Ling Cheng ◽  
Yong Jun Hu ◽  
She Jun Hu ◽  
Lin Yu ◽  
Guang Rong Xie
Keyword(s):  
Photocatalytic Activity ◽  
Annealing Temperature ◽  
Ion Beam ◽  
Annealing Treatment ◽  
Antibacterial Activities ◽  
Amorphous Structure ◽  
Vacuum Arc ◽  
E Coli ◽  
Vacuum Arc Deposition ◽  
Arc Deposition

The N-doped TiO2films were prepared by cathode vacuum arc deposition with ion beam assisted. Influence of annealing temperature on the microstructure, optical property, photocatalytic activity and antibacterial activities of the N-doped TiO2films was studied. The experimental results indicate that annealing treatment significantly affects both microstructure and photoactivity. All the as deposited N-doped TiO2films retained an amorphous structure, the crystalline structure of N-doped TiO2films annealed in the range 400°C- 600°C were examined to be of anatase structure with a (101) preferential orientation，photocatalytic activity of the N-doped TiO2film annealed at 500°C was best under visible light, The N-doped TiO2films against E. coli and S. aureus had more than 99% antibacterial rate, and the antibacterial activity of the N-doped TiO2films stronger slightly with the increase of the annealing temperature.

The stabilization of B.C.C. Cu in Cu/Nb nanolayered composites

1996 ◽  
Vol 54 ◽  
pp. 228-229
Author(s):  
H. Kung ◽  
A.J. Griffin ◽  
Y.C. Lu ◽  
K.E. Sickafus ◽  
T.E. Mitchell ◽  
...  
Keyword(s):  
Electrical Resistivity ◽  
Layer Thickness ◽  
Volume Fraction ◽  
Ion Beam ◽  
High Strength ◽  
Cross Sectional ◽  
Metastable Structure ◽  
High Resolution Tem ◽  
Potential Improvement ◽  
Two Phases

Materials with compositionally modulated structures have gained much attention recently due to potential improvement in electrical, magnetic and mechanical properties. Specifically, Cu-Nb laminate systems have been extensively studied mainly due to the combination of high strength, and superior thermal and electrical conductivity that can be obtained and optimized for the different applications. The effect of layer thickness on the hardness, residual stress and electrical resistivity has been investigated. In general, increases in hardness and electrical resistivity have been observed with decreasing layer thickness. In addition, reduction in structural scale has caused the formation of a metastable structure which exhibits uniquely different properties. In this study, we report the formation of b.c.c. Cu in highly textured Cu/Nb nanolayers. A series of Cu/Nb nanolayered films, with alternating Cu and Nb layers, were prepared by dc magnetron sputtering onto Si {100} wafers. The nominal total thickness of each layered film was 1 μm. The layer thickness was varied between 1 nm and 500 nm with the volume fraction of the two phases kept constant at 50%. The deposition rates and film densities were determined through a combination of profilometry and ion beam analysis techniques. Cross-sectional transmission electron microscopy (XTEM) was used to examine the structure, phase and grain size distribution of the as-sputtered films. A JEOL 3000F high resolution TEM was used to characterize the microstructure.

DOGAL LAD

Alloy Digest ◽  
2011 ◽  
Vol 60 (10) ◽  
Keyword(s):  
Yield Strength ◽  
Physical Properties ◽  
Surface Treatment ◽  
Tensile Properties ◽  
High Strength ◽  
Heat Treating ◽  
Minimum Yield

Abstract Dogal 300 LAD, 340 LAD, 380 LAD, 420 LAD, 460 LAD and 500 LAD are high-strength low alloyed steels intended for pressing. The designation in the name is the guaranteed minimum yield strength. Dogal steels can be zinc coated. This datasheet provides information on composition, physical properties, and tensile properties. It also includes information on surface qualities as well as forming, heat treating, joining, and surface treatment. Filing Code: CS-167. Producer or source: SSAB Swedish Steel Inc..

RUUKKI RAEX 300

Alloy Digest ◽  
2012 ◽  
Vol 61 (2) ◽  
Keyword(s):  
Fracture Toughness ◽  
Wear Resistance ◽  
Shear Strength ◽  
Impact Toughness ◽  
Yield Strength ◽  
Physical Properties ◽  
Tensile Properties ◽  
High Strength ◽  
Structural Components ◽  
Wear Resistant

Abstract RUUKKI RAEX 300 (typical yield strength 900 MPa) is part of the Raex family of high-strength and wear-resistant steels with favorable hardness and impact toughness to extend life and decrease wear in structural components. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and shear strength as well as fracture toughness. It also includes information on wear resistance as well as forming, machining, and joining. Filing Code: SA-643. Producer or source: Rautaruukki Corporation.

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