Dynamic experimental studies of A6N01S-T5 aluminum alloy material and structure for high-speed trains

Aluminum alloy components of high-speed trains have a great risk of being corroded by various corrosive medium due to extremely complex atmospheric environments. This will bring out huge losses and reduce the safety and stability of trains. In order to solve the problem, cold spray process was used for repairing the damage of the aluminum alloy components with Al-based powders. Microstructure, mechanical properties and corrosion behavior were studied. The results indicated that there were very few pores and cracks in the repaired areas after repairing. The average microhardness of the repaired areas was 54.5 HV ± 3.4 HV, and the tensile strength of the repaired samples was 160.4 MPa. After neutral salt spray tests for 1000 h, the rate of mass loss of the samples repaired by cold spray was lower than that of 6A01 aluminum alloy. The electrochemical test results showed that the repaired areas had a higher open circuit potential than 6A01 aluminum alloy. As a result, the repaired areas such as the anode protected its nearby substrate. The samples repaired by cold spray exhibited better corrosion than 6A01 aluminum alloy. Cold spray process and Al-based powders are applicable for repairing the aluminum alloy components of high-speed trains.

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Elements loss analysis based on spectral diagnosis in laser-arc hybrid welding of aluminum alloy

International Journal of Modern Physics B ◽

10.1142/s0217979217440362 ◽

2017 ◽

Vol 31 (16-19) ◽

pp. 1744036

Author(s):

Yong Chen ◽

Hui Chen ◽

Minhao Zhu ◽

Tao Yang ◽

Lin Shen

Keyword(s):

Aluminum Alloy ◽

High Speed ◽

Welding Process ◽

Spectral Intensity ◽

Hybrid Welding ◽

Loss Analysis ◽

Welding Defects ◽

High Speed Trains ◽

Arc Current ◽

Weld Area

Aluminum alloy has been widely used in automobiles, high-speed trains, aerospace and many other fields. The loss of elements during welding process causes welding defects and affects the microstructure and properties of the joints. This paper discusses the correlation between welding process, spectral intensity and loss of elements in laser-arc hybrid welding of Al alloys. The results show that laser power and arc current have a significant impact on the spectral intensity and loss of elements. Compared with the base metal, the contents of alloying elements in the weld area are lower. The burning losses of alloy elements increase with the welding heat input.

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Lightweight Research on Aluminum Alloy Material of Rear Axle Differential

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.723.294 ◽

2016 ◽

Vol 723 ◽

pp. 294-298 ◽

Cited By ~ 2

Author(s):

Jin Li Xu ◽

Qiang He ◽

Ding Jun Zhu

Keyword(s):

Aluminum Alloy ◽

Ductile Iron ◽

Weight Reduction ◽

High Speed ◽

Rear Axle ◽

New Materials ◽

Iron Aluminum ◽

Alloy Material ◽

Differential Housing ◽

Drive Axle

Aluminum and other materials are used more widely with the improvement of car’s weight reduction requirements and the high speed development of new materials. Differential housing is one of the important parts of automobiles drive axle, it is still heavy despite many optimization and improvement because that it is produced by ductile iron. Aluminum alloy material used in the differential housing are studied with FEA. The analysis results show that the weight is reduced by 60%, and a reference is provided for the lightweight of automobile.

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Study on the AZ31B Magnesium Alloy in the Application on High-Speed Trains

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.535-537.875 ◽

2012 ◽

Vol 535-537 ◽

pp. 875-879 ◽

Cited By ~ 1

Author(s):

Jia Zhen Liu ◽

Yan Hui Zhao ◽

Lei Song ◽

Zhong Xia Xiang

Keyword(s):

Mechanical Properties ◽

Aluminum Alloy ◽

Magnesium Alloy ◽

High Speed ◽

Equivalent Stress ◽

Strength Analysis ◽

Az31b Magnesium Alloy ◽

High Speed Trains ◽

6063 Aluminum Alloy ◽

The Impact

6063 aluminum alloys are used as the luggage rack’s material on high-speed trains recently. The study on the AZ31B magnesium alloy is aimed to demonstrate the feasibility of the magnesium alloy’s application as the material of the luggage rack on high-speed trains. First, the mechanical properties of the AZ31B magnesium was obtained after a series of experimental tests on basic mechanical properties of the AZ31B magnesium alloy. The results show that the strength of the magnesium alloy is 1.25 times of the 6063 aluminum alloy and the impact toughness of the AZ31B magnesium alloy is twice as much as the 6063 aluminum alloy. Second, the stress distribution and the maximum value of the equivalent stress in given loading conditions was obtained by finite element strength analysis on the structure of the aluminum alloy luggage rack on high-speed trains. And the FE analysis results indicate that if the AZ31B magnesium alloy is used as the material of the luggage rack instead of the 6063 aluminum alloy, it will have a weight loss of the luggage rack for approximately 33%. In addition, the application of AZ31B magnesium alloy has more advantages in energy-saving, environmental protection and safety control.

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Vibrations’ formation and transmission during high-speed trains’ operation

Bulletin of scientific research results ◽

10.20295/2223-9987-2017-3-89-95 ◽

2017 ◽

pp. 89-95

Author(s):

Tamila Tytova ◽

Aleksander Shashuryn ◽

Konstantin Buzhynskiy ◽

Valeriy Svetlov

Keyword(s):

Calculation Method ◽

High Speed ◽

Practical Importance ◽

Experimental Studies ◽

Wave Impedance ◽

Internal Loss ◽

Vibration Attenuation ◽

High Speed Trains ◽

Vibration Wave ◽

The Given

Objective: To determine the mechanisms of vibration’s occurrence and transmission during high-speed trains’ operation. Methods: The occurrence and transmission of vibration is calculated by means of vibration attenuation calculation method, which results from the extension of the vibration wave front in space, ground internal loss and elastic medium wave impedance. Results: Theoretical studies were generally confirmed by the results of experimental studies. Practical importance: Application of the given calculation method of vibration dumping in the early stages of high-speed railway lines construction, in order to predict the level of vibrations and select the means of level protection.

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Effect of sand-blasting on fatigue properties of 7N01 aluminum alloy

International Journal of Modern Physics B ◽

10.1142/s0217979219400034 ◽

2019 ◽

Vol 33 (01n03) ◽

pp. 1940003 ◽

Cited By ~ 1

Author(s):

Shali Qu ◽

Min Yu

Keyword(s):

Residual Stress ◽

Aluminum Alloy ◽

Fatigue Life ◽

High Speed ◽

Fatigue Properties ◽

Sand Particle ◽

Surface Zone ◽

Sand Blasting ◽

Depth Direction ◽

High Speed Trains

Certain high-speed trains often suffer from the erosion of wind-drift sand during the serving period. The present paper simulated this sand-blasting process with consideration of sand-blasting pressure, angle, distance and sand particle size representing different natural conditions. Results show that the grit size has the greatest influence on roughness and residual stress of the 7N01 aluminum alloy based on the orthogonal test. The samples after low intensity sand-blasting (LISB) were characterized by micro-hardness, surface morphology and fatigue test. Results show that the surface of the blasted sample was severely impinged in form of extruded ridges crater-like morphology, representing different roughness values. The LISB causes a similar spoon shape residual stress distribution along the depth direction and it also increases the hardness of the surface zone. Finally, the residual compressive stress plays an important role in the improvement of the fatigue life, and the increase of roughness can seriously shorten the fatigue life.

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Hydrogen embrittlement of the 7B05‐T5 aluminum alloy for high‐speed trains

Materials and Corrosion ◽

10.1002/maco.201910975 ◽

2019 ◽

Vol 71 (1) ◽

pp. 70-76

Author(s):

Lin Shen ◽

Hui Chen ◽

Xiaoli Che ◽

Lidong Xu

Keyword(s):

Aluminum Alloy ◽

Hydrogen Embrittlement ◽

High Speed ◽

High Speed Trains

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Dynamic Analysis of Historic Railway Bridges in Poland in the Context of Adjusting Them to Pendolino Trains

International Journal of Applied Mechanics and Engineering ◽

10.1515/ijame-2015-0019 ◽

2015 ◽

Vol 20 (2) ◽

pp. 283-297 ◽

Cited By ~ 1

Author(s):

K. Grębowski ◽

M. Zielińska

Keyword(s):

Dynamic Analysis ◽

Dynamic Model ◽

High Speed ◽

Experimental Studies ◽

Rolling Stock ◽

Railway Bridge ◽

High Speed Train ◽

Railway Bridges ◽

High Speed Trains ◽

Identical Type

Abstract The article presents the dynamic analysis of the historic railway bridge in Tczew as an example of the usefulness of such type of bridge for high-speed trains. The model of the bridge and the simulation of rolling stock passage was performed in SOFISTIK program. The scope of work includes experimental studies, the solution of the problem concerning the correct solution features of the dynamic model which takes into account the dependencies between the bridge, track and rolling - stock (RBT). The verification of the model was performed by comparing the results obtained on site during the passage of ET-22 locomotive and twenty (20) open goods wagons with the results obtained in the program for the identical type of rolling stock used to the simulation Pendolino train. Then, after the verification, the simulation of high-speed train passage was performed. The speed of the train passage varied from 150 [km/h] to the max. possible speed of 250 [km/h] which PENDOLINO train, approved for the simulation, may reach. Under the analysis of obtained results it was possible to define the conditions for adjusting the historic bridge to high-speed train passage.

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