scholarly journals The Progress of the Research Work on Fatigue of Metals in the 25th Subcommittee of Japan Society for the Promotion of Scientific Research : Relation between Endurance Limit Diagram and Ultimate Tensile Strength of Steels

1941 ◽  
Vol 7 (29-1) ◽  
pp. 5-7
Author(s):  
Keniti MINAMIOZI ◽  
Zyunzo TAKABAYASI
Keyword(s):  
Tensile Strength ◽  
Ultimate Tensile Strength ◽  
Endurance Limit ◽  
Research Work ◽  
Scientific Research ◽  
Japan Society

scholarly journals Fatigue Strength of Acacia Mangium

2019 ◽  
pp. 29-32
Keyword(s):  
Tensile Strength ◽  
Fatigue Strength ◽  
Ultimate Tensile Strength ◽  
Endurance Limit ◽  
Acacia Mangium ◽  
Vertical Axis ◽  
Life Cycles ◽  
Grain Angle ◽  
Sinusoidal Waveform ◽  
Fatigue Endurance

The works in this study is to investigate and understand the nature of Acacia mangium axial fatigue strengths under repeated stress. Acacia mangium trees were cut to produce oven-dried Small Clear Specimens that were then tested until fracture in parallel to the grain direction. This was carried out in order to discover its Ultimate Tensile Strength, which was later identified as 143.87 MPa, in parallel to the grain direction (0° grain angle). In the next phase, specimens were tested for fatigue strengths in repeated-tensile sinusoidal waveform loading at 100 Hz frequency. The stress levels for this test were at the ratios of 80, 60, 40, 30, 20 and 10% of the Ultimate Tensile Strength (0° grain angle) for the construction of Life (N) - Stress (S) plots and empirical correlation. It was observed that the Acacia Mangium N-S (Wöhler) plots have an exponential correlation with the N – intercept of vertical axis at five (5) million cycles, while the intercept of horizontal, S – axis, was at 143.87 MPa. The study also observed that Acacia mangium achieves 106 life cycles at 10% stress level. For this reason, it is concluded that the material has a fatigue endurance limit at 10% of the Ultimate Tensile Strength for 0° grain angle.

Optimization of ultimate tensile strength of welded Inconel 625 and duplex 2205

2021 ◽  
Vol 15 (1) ◽  
pp. 7715-7728
Author(s):  
S. Madhankumar ◽  
K. Manonmani ◽  
V. Karthickeyan ◽  
N. Balaji
Keyword(s):  
Tensile Strength ◽  
Stainless Steel ◽  
Ultimate Tensile Strength ◽  
Research Work ◽  
Testing Machine ◽  
Laser Beam Welding ◽  
Inconel 625 ◽  
Bead Geometry ◽  
Tensile Testing Machine ◽  
Inconel 625 Alloy

The ultimate strength is an important property of any material for the manufacturing of components. This paper utilized the laser beam welding (LBW), due to its smaller dimension, which produces lesser distortion and process velocity is higher. Inconel 625 alloy and duplex 2205 stainless steel is having higher strength and corrosive resistance properties. Due to the above-mentioned properties, it could be used in oil and gas storage containers, marine and geothermal applications. This research work presents an investigation of various input variable effects on the output variable (ultimate tensile strength) in LBW for dissimilar materials namely, Inconel 625 alloy and duplex 2205 stainless steel. The input variables for this research are the power of a laser, welding speed, and focal position. The experimental runs are developed with the help of design of experiment (DOE) and utilized statistical design expert software. The ultimate tensile strength on different runs is measured using a universal tensile testing machine. Then from a response surface methodology and ANOVA, the optimum value of ultimate tensile strength was determined to maximize the weld joint and bead geometry. Finally, the confirmation test was carried out, it reveals the maximum error of 0.912% with the predicted value. In addition, the microstructure of the weld beads was examined using optical microscopy.

Effect of TiC Addition and Cooling Rate on Mechanical Properties of 316L Stainless Steel Composites

2011 ◽  
Vol 311-313 ◽  
pp. 84-87
Author(s):  
Shao Jiang Lin ◽  
Sai Yu Wang
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Stainless Steel ◽  
Ultimate Tensile Strength ◽  
Cooling Rate ◽  
316L Stainless Steel ◽  
Research Work ◽  
Elongation To Failure ◽  
Tic Particle ◽  
Particle Addition

The present research work concerns the development of TiC reinforced 316L stainless steel composites through powder metallurgical technology and sintered in vacuum. The effect of TiC particle addition and cooling rate on the mechanical properties of 316L stainless steel composites has been investigated. The results show that increasing the cooling rate caused enhancement of ultimate tensile strength and microhardness. However, the elongation to failure of the composites was decreased with the increase of cooling rate. The addition of TiC particle was found to improve the ultimate tensile strength of 316L stainless steel composites. The highest tensile strength was 648 MPa in specimens containing 5wt.% TiC. Further increase in TiC content to 10wt% results in a reduction in tensile strength to 631 MPa.

Further Investigation of a Relation for Cumulative Fatigue Damage in Bending

1965 ◽  
Vol 87 (1) ◽  
pp. 25-35 ◽  
Author(s):  
S. S. Manson ◽  
A. J. Nachtigall ◽  
C. R. Ensign ◽  
J. C. Freche
Keyword(s):  
Tensile Strength ◽  
Ultimate Tensile Strength ◽  
Endurance Limit ◽  
Fatigue Behavior ◽  
Intersection Point ◽  
Original Material ◽  
Rotating Bending Fatigue ◽  
Rotating Bending ◽  
Cumulative Fatigue Damage ◽  
Aisi 4130

The fatigue behavior of several steels, AISI 4130, E52100, and 304 ELC stainless, as well as that of a nonferrous alloy, 5456-H311, was investigated in rotating bending fatigue after these materials were subjected to a prestress for different cyclic histories. The data obtained corroborated the hypothesis proposed by the authors earlier that lines representing the S – log N relation of a material prestressed in varying amounts will intersect the S – log N line of the original material near a common point. A correlation was found between the stress at this intersection point and the ultimate tensile strength. Thus, the only requirements for establishing the fatigue behavior of a prestressed material in the range of stresses where the S – log N line is inclined are the S – log N line of the original material and the ultimate tensile strength. The importance of determining the new endurance limit of a material after prestressing was shown analytically. The omission from cycle ratio summations of cyclic histories applied below the original, but above the new, endurance limit of a material was shown for an illustrative example to result in a cycle ratio summation less than unity, which leads to unconservative estimates of fatigue life. Cyclic histories so applied can produce damage and must be taken into account. A new hypothesis based upon actual fatigue behavior and incorporating a cycle ratio-modified stress ratio factor is suggested, which holds promise for predicting more accurately the new endurance limit than most existing methods. Extensive additional tests are required to verify this concept.

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