scholarly journals STUDY OF MECHANICAL PROPERTIES AND STRUCTURE OF LARGE-SIZED SEMI-FINISHED PRODUCTS MADE OF VT6ch TITANIUM ALLOY

2020 ◽  
pp. 12-18
Author(s):  
A.L. Yakovlev ◽  
◽  
A.A. Arislanov ◽  
S.V. Putyrskiy ◽  
N.A. Nochovnaya ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Titanium Alloy ◽  
Comparative Analysis ◽  
Impact Strength ◽  
Low Cycle Fatigue ◽  
Cycle Fatigue ◽  
Structural Components ◽  
Final Deformation

The article presents the results of a complex of studies (analysis of microstructure, as well as determination of mechanical properties under tension, impact strength (KCU), low-cycle fatigue (LCF), fracture toughness (K1с)) of large-sized forgings made of titanium alloy Vt6сh, providing for the final deformation in the (α+β)-region, as well as large-sized profiles and stamping made of titanium alloy Vt6сh, providing for the final deformation in the β-region. A comparative analysis of the data obtained during the research shows the dependence of the mechanical properties of semi-finished products with plate-like structure on the size of the structural components – of primary β-grains and colonies of α-plates. This is especially noticeable for the characteristics of plasticity.

scholarly journals The Reliability of the Results of the Modified Low-cycle Fatigue Test for Cast Iron Evaluated by Metallographic Studies

2015 ◽  
Vol 15 (1) ◽  
pp. 41-46
Author(s):  
M. Maj ◽  
K. Pietrzak
Keyword(s):  
Mechanical Properties ◽  
Cast Iron ◽  
Light Microscopy ◽  
Fatigue Test ◽  
Low Cycle Fatigue ◽  
Scanning Microscopy ◽  
Cycle Fatigue ◽  
Characteristic Features

Abstract This study discloses the characteristic features of the modified low-cycle fatigue test used for the determination of the mechanical properties of two types of cast iron, i.e. EN-GJL-250 and EN-GJS-600-3. For selected materials, metallographic studies were also conducted in the range of light microscopy and scanning microscopy.

Study on Mechanical Behaviors of 16MnR Steel after Long Term Used as Liquefied Petroleum Gas Vessel

2005 ◽  
Vol 297-300 ◽  
pp. 963-967
Author(s):  
Bing Bing Chen ◽  
Wei Ming Sun ◽  
Zeng Liang Gao ◽  
De Ming Fang
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Growth Rate ◽  
Low Cycle Fatigue ◽  
Pressure Vessels ◽  
Fatigue Properties ◽  
Cycle Fatigue ◽  
Liquefied Petroleum Gas ◽  
Mechanical Behaviors

16MnR steel is one of C-Mn steels widely used for pressure vessels in China. Mechanical behaviors of 16MnR steel used as liquefied petroleum gas vessel for about 100,000hr have been investigated in this paper. The macrostructure, fracture toughness, fatigue-crack growth rate, and low-cycle fatigue properties of the samples have been studied in detail. Compared the results with that of GB6654-86 (one of Chinese national material standards) and other test data of 16MnR steel, it indicates that the mechanical properties of the long-term used 16MnR steel have not been degraded and aged.

scholarly journals Influence of heat treatment on the microstructure and mechanical properties of TC17 Titanium Alloy

2018 ◽  
Vol 190 ◽  
pp. 07002
Author(s):  
Wang Min ◽  
Huang Darong ◽  
Fan Ya ◽  
Nin YongQuan ◽  
Guo Hongzhen ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Fracture Toughness ◽  
Titanium Alloy ◽  
Aging Temperature ◽  
Low Cycle Fatigue ◽  
Holding Time ◽  
Fatigue Properties ◽  
Technical Requirements ◽  
Microstructure And Mechanical Properties

The influence of heat treatment on the microstructure and mechanical properties of TC17 titanium alloy was investigated by changing holding time before forging and aging temperature after β-forging. A better heat treatment mechanism was chosen according to its working requirements. The results showed that the holding time and aging temperature had a significant influence on microstructures and mechanical properties of TC17 alloy. With the increase of holding time before forging in the single β phase region, the original β grain size enlarge, the strength and fracture toughness decrease, and the plasticity increases. The size of lamellar α-phase bundles enlarge with the rise of aging temperature after β-forging, the orientated relationship becomes simple, and the content of β-transformation increases. And the plasticity and fracture toughness of the alloy increase, the strength and hardness decreases. The fracture toughness is better under the heat treatment mechanism at 873°C/2h +918°C/64min before forging, 800°C/4h,WC+660°C /8h AC after forging, with the high and low cycle fatigue properties meet the technical requirements.

ANALYSIS OF THE EFFECT OF HEAT TREATMENT ON THE STRUCTURE AND MECHANICAL PROPERTIES OF BARS MADE OF VT47 TITANIUM ALLOY

2021 ◽  
pp. 26-34
Author(s):  
V.A. Duyunova ◽  
◽  
S.V. Putyrskiy ◽  
A.A. Arislanov ◽  
V.A. Krokhina ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Titanium Alloy ◽  
Comparative Analysis ◽  
Room Temperature ◽  
Shear Resistance ◽  
Technological Plasticity ◽  
Research Results

The article presents the results of a complex of studies on the analysis of the microstructure, as well as the determination of the mechanical properties under tension, shear resistance and upsetting at room temperature of rolled bars made of pseudo-β-titanium alloy VT47. A comparative analysis of the obtained research results is carried out, showing the dependence of the mechanical properties of rolled bars on various heat treatment modes, aimed at providing increased technological plasticity of the material and strengthening heat treatment.

Characteristics of Wheel Tread for Property Improvement of Railway Wheel

2006 ◽  
Vol 326-328 ◽  
pp. 1075-1078
Author(s):  
Seok Jin Kwon ◽  
Jung Won Seo ◽  
Hyun Mu Hur ◽  
Sung Tae Kwon
Keyword(s):  
Fracture Toughness ◽  
Low Temperature ◽  
Impact Energy ◽  
Low Cycle Fatigue ◽  
Maintenance Cost ◽  
Railway Vehicle ◽  
Cycle Fatigue ◽  
Railway Wheel ◽  
Mechanics Characteristics ◽  
Wheel Material

Despite of improvement of wheel material for railway vehicle, the damages of railway wheel have been occurred in service running. Because of wheel damage with spalling, shelling and thermal crack, the maintenance cost for the railway wheel has increased. The railway wheel had standardized but the chemical composition, the mechanical property and the hardness with respect to railway wheel is merely established. In order to reduce wheel damage, it is necessary to reinforce the standard of railway wheel. In present study, the fracture mechanics characteristics of railway wheel such as low cycle fatigue, fracture toughness, impact energy depended on low temperature and so on have tested. The result shows that the standard of railway wheel has to supplement fracture toughness and impact energy depended on low temperature etc.

Fracture toughness evolution of a carbon/carbon composite after low-cycle fatigue

2019 ◽  
Vol 206 ◽  
pp. 442-451 ◽  
Author(s):  
A.A. Stepashkin ◽  
D.Yu. Ozherelkov ◽  
Yu.B. Sazonov ◽  
A.A. Komissarov
Keyword(s):  
Fracture Toughness ◽  
Low Cycle Fatigue ◽  
Carbon Composite ◽  
Cycle Fatigue
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