scholarly journals Research on mariner growth prevention and anticorrosion tests of new type high toughness Resin/Steel/Copper alloy system

2016 ◽  
Author(s):  
Jun Suo ◽  
Bo Zhang
Keyword(s):  
Copper Alloy ◽  
Alloy System ◽  
High Toughness ◽  
New Type

Theoretical Analysis of Reinforced Beams of UHTCC

2018 ◽  
Vol 878 ◽  
pp. 18-22
Author(s):  
Hua Qiang Yu
Keyword(s):  
Crack Width ◽  
Approximate Formula ◽  
Crack Spacing ◽  
Cementitious Composite ◽  
Reinforcement Effect ◽  
Ordinary Concrete ◽  
High Toughness ◽  
Reinforced Beams ◽  
New Type ◽  
Average Crack

UHTCC (Ultra High Toughness Cementitious Composite) is a new type of material which is widely used in this study. It is a kind of cement-based material with very good toughness. It is effective to improve the performance of damaged reinforced concrete and improve its durability. UHTCC is widely used in the reinforcement of concrete structures. There is no clear and effective method for calculating it. There is an approximate formula for the crack width of ordinary concrete. The concept of an average crack spacing is used in the derivation of the formula. The limit of UHTCC for cracks can be measured by the concept of average crack spacing. According to the obtained crack width limit, the reinforcement effect of UHTCC can be shown.

Ways to Improve the Drilling Effectiveness of Rock Bits by a Tribological Method

1988 ◽  
Vol 110 (2) ◽  
pp. 212-215 ◽  
Author(s):  
Yi-Ling Wang ◽  
Hong Luo
Keyword(s):  
Copper Alloy ◽  
Production Cost ◽  
New Type ◽  
Higher Temperature ◽  
Rotary Speed ◽  
Wear Tests ◽  
The Way

Wear tests on the main bearings of 8.5 inch XHP 3 rock bits were performed, from which it is concluded that the way to improve the drilling effectiveness for the rock bits is to set drilling pressure and rotary speed properly, and to develop a new type of grease for rock bits which can bear a higher temperature than conventional grease. In addition, it is also shown that an inexpensive copper alloy can take the place of expensive Ag85Mn15 as an anti-wear material in the bearing, so that the production cost for the rock bits can be reduced.

The Study of the Copper Alloy Structure and Properties

2021 ◽  
Vol 316 ◽  
pp. 433-437
Author(s):  
Sergey V. Brusnitsyn ◽  
Irina A. Gruzdeva ◽  
Ivan A. Sokolov
Keyword(s):  
Electrical Resistivity ◽  
Copper Alloy ◽  
High Speed ◽  
Copper Alloys ◽  
Cold Deformation ◽  
Alloy System ◽  
Deformation Degree ◽  
Contact Wire ◽  
Offset Yield Strength ◽  
Tin Content

This paper is devoted to the possibility of using tin as an alloying element in a copper alloy for the contact wire manufacture for high-speed electrified railways. To this end, laboratory experiments were carried out to determine the effect of tin on the structure, mechanical and electrical properties of samples, made of low-alloy system Cu-Sn alloys, under the cold deformation. Cast rods and rolled billets of CuSn0,2, CuSn0,4 and CuSn0,6 alloys are made. The cast rods macrostructure is studied. The analysis showed that with the introduction of tin into copper, there is no zone of columnar crystals in the macrostructure. Moreover, it was found that grains of α-solid solution of tin in copper have a shape close to equiaxial. A structure analysis of rolled billets showed that an increase in the deformation degree leads to grinding of crystalline grains. The mechanical properties of rolled billets were determined: ultimate tensile strength σU, offset yield strength σ0.2 and elongation δ50. The dependence of the electrical resistivity of rolled billets on the deformation degree and the tin content in the alloy is determined. Еhe higher the tin content in the alloy and the deformation degree is, the higher is the electrical resistivity. The electrical resistivity of samples, made of CuSn0.2 and CuSn0.4 alloys, coincides with the GOST R 55647-2018 requirements. The laboratory studies have shown that tin-containing copper alloys (Sn is up to 0.4 wt. %) can be recommended as a material for the manufacture of contact wire.

Study on Preparation of a High-Strength and High-Toughness Low-Alloy Steel for Cross Member of Forklift Mask

2014 ◽  
Vol 1002 ◽  
pp. 61-64
Author(s):  
San Zhou Yi ◽  
Yong Su ◽  
Bin Wan ◽  
Ran Wei
Keyword(s):  
Alloy Steel ◽  
High Strength ◽  
Casting Process ◽  
Treatment Technique ◽  
Low Alloy Steel ◽  
High Toughness ◽  
Performance Requirements ◽  
Comprehensive Properties ◽  
Cross Member ◽  
New Type

According to the performance requirements of the cross member for forklift mask, a new type of high-strength and high-toughness low-alloy steel is designed by multi-element alloying. Through orthogonal testing, the optimized heat treatment technique is obtained. After being normalized at 870°C, quenched at 910°C and tempered at 600°C, the steel produces tempered sorbite which makes the steel the optimum combination of tensile strength Rm and percentage elongation δ (Rm≥750MPa, δ≥20%). Then, the investment casting process is determined. The casting with excellent comprehensive properties is determined.

Studies of New-Type Titanium Alloys for Aviation Applications in China

2014 ◽  
Vol 687-691 ◽  
pp. 4362-4366
Author(s):  
Zhi Shou Zhu ◽  
Xin Nan Wang ◽  
Guo Qiang Shang
Keyword(s):  
Titanium Alloy ◽  
Titanium Alloys ◽  
Electron Beam Welding ◽  
Damage Tolerance ◽  
High Strength ◽  
Aviation Industry ◽  
Processing Technologies ◽  
High Toughness ◽  
New Type ◽  
Airframe Structures

The latest R&D of new-type titanium alloys and their aviation applications as well as the newly developed processing technologies in China have been reviewed in this paper. To meet the requirements of high performance and low cost design of aviation-oriented titanium alloys, great efforts and achievements have been made in establishing a system with Chinese characteristics, in which the low-strength-and-high-toughness titanium alloy (such as Ti45Nb alloy used for fasteners and TA18 for tubes & pipes), the medium-strength and high-damage-tolerance titanium alloy (such as TC4-DT used for large-integral airframe structures), the high-strength and high-toughness damage tolerance titanium alloy (such as TC21 used for large-integral airframe structures), and the ultra-high strength titanium alloy (such as TB8) are included. Some new processing technologies such as quasi-β forging and quasi-β heat treatment, integral isothermal forging and electron beam welding, have been demonstrated to be able to markedly enhance the properties of titanium alloys, which is regarded to be very important in increasing the application amount and level of titanium in aviation industry.

Optical constants of gold-silver-copper alloy system

2014 ◽  
Author(s):  
Yoshikazu Hashimoto ◽  
Yoshiaki Nishijima ◽  
Gediminas Seniutinas ◽  
Lorenzo Rosa ◽  
Saulius Juodkazis
Keyword(s):  
Copper Alloy ◽  
Optical Constants ◽  
Alloy System ◽  
Silver Copper ◽  
Gold Silver

The Effect of Aluminum Equivalent and Molybdenum Equivalent on the Mechanical Properties of High Strength and High Toughness Titanium Alloys

2009 ◽  
Vol 618-619 ◽  
pp. 169-172 ◽  
Author(s):  
Yu Lan Yang ◽  
Wei Qi Wang ◽  
Feng Li Li ◽  
Wei Qing Li ◽  
Yong Qiang Zhang
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Tensile Strength ◽  
Titanium Alloys ◽  
High Strength ◽  
Good Combination ◽  
High Toughness ◽  
Value Range ◽  
New Type ◽  
Aluminum Equivalent

The effect of Aluminum equivalent and Molybdenum equivalent on the strength and fracture toughness of titanium alloys was studied in this paper. The result shows that the tensile strength of the alloy increases with increasing of aluminum equivalent and molybdenum equivalent and the fracture toughness decreases gradually, the effect of aluminum equivalent is comparatively more conspicuous. A suitable value range of aluminum equivalent and molybdenum equivalent of high strength and high toughness titanium alloys are obtained from the analysis, based on this, a new type of high strength and high toughness titanium alloy BTi-6554 (Ti-4Al-5Mo-5V-6Cr) was developed, which has good combination of strength and fracture toughness and has the characteristics of high strength and high toughness.

The Microstructure and Mechanical Properties of High-Strength and High-Toughness Titanium Alloy BTi-6554 Bar

2009 ◽  
Vol 618-619 ◽  
pp. 173-176 ◽  
Author(s):  
Wei Qi Wang ◽  
Yu Lan Yang ◽  
Yong Qiang Zhang ◽  
Feng Li Li ◽  
Hui Li Yang ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Treatment Condition ◽  
Aging Treatment ◽  
High Strength ◽  
Plastic Property ◽  
Good Prospect ◽  
Phase Zone ◽  
High Toughness ◽  
Β Phase ◽  
New Type

This paper is concert about the mechanical property of high strength and high toughness titanium alloy BTi-6554 (Ti-6Cr-5Mo-5V-4Al) bars. The results show that: in β-phase zone solid solution + aging treatment condition, the strength and fracture toughness of the alloy at room temperature can reach a higher level while inα+β)-phase solution + aging treatment condition, the plastic property is relatively high. Compared with Ti-1023 and VT22 alloy bars produced by the similar processing procedure, the alloy shows improved properties combined in strength and toughness. BTi-6554 is a new type of titanium alloy with high structural efficiency, and has a good prospect for commercial and application.

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