Non-Bonded Interactions:  A Hardening Factor in Nanomolecular Rods

2008 ◽  
Vol 112 (6) ◽  
pp. 1925-1928 ◽  
Author(s):  
Lior Itzhaki ◽  
Eli Altus ◽  
Harold Basch ◽  
Shmaryahu Hoz
Keyword(s):  
Hardening Factor

JOSLYN STAINLESS TYPE 305H

Alloy Digest ◽  
1966 ◽  
Vol 15 (3) ◽  
Keyword(s):  
Fracture Toughness ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Physical Properties ◽  
Stainless Steels ◽  
Work Hardening ◽  
Heat Treating ◽  
Nickel Steel ◽  
Temperature Performance ◽  
Hardening Factor

Abstract Joslyn Stainless Type-305H is a modified austenitic chromium-nickel steel recommended for severe cold heading applications because of its low work-hardening factor. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness and creep. It also includes information on low and high temperature performance, and corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: SS-178. Producer or source: Joslyn Stainless Steels.

Analytical Study of the Effect of NaCl Solution on Fatigue Resistance of Rotating Shafts

2020 ◽  
Vol 398 ◽  
pp. 147-155
Author(s):  
Sabah Hatam Obaid ◽  
Adnan Noori Ahmed ◽  
Hadi Raheem Ibrahim
Keyword(s):  
Shear Stress ◽  
Strain Hardening ◽  
Salt Concentration ◽  
Surface Hardening ◽  
Rain Water ◽  
Surface Strain ◽  
Dynamic Shear ◽  
Water Drainage ◽  
Drainage Networks ◽  
Hardening Factor

Dynamic shafts subjecting to salty rain water, especially in places with no rain water drainage networks, is undesirable because this media causes corrosion of the parts of shaft that increases as increasing of shaft immersion in a salty media (NaCl) also, increasing of concentration which in turns reducing number of operation runs. Increasing salt concentration from 3% to 6% NaCl results in decreasing of operation runs from 25600 to 17100 runs. Also, increasing salt concentration leads to raise the effect of alternating stress that makes strain hardening factor drop to 0.45 and ratio of dynamic shear stress to static one raise to 2.44 that affects shaft metal performance to resist fatigue. Samples were also, treated by oxy acetylene surface hardening and were cooled by immersion in oil then immersion in 6% NaCl salty solution, the results showed that number of operation runs before failure had increased up to 71022, the effect of alternating stress had decreased down to 6100 N/m2, surface strain hardening factor had increased up to , also ratio of dynamic shear stress to static one had decreased down to 0.839. This is a good indicator of the effectiveness of surface hardening process of shaft parts that subject to salty rain water during maintenance operations.

High-Frequency Fatigue of Metals and Their Cavitation-Damage Resistance

1966 ◽  
Vol 88 (3) ◽  
pp. 332-340 ◽  
Author(s):  
A. Thiruvengadam
Keyword(s):  
Strain Rate ◽  
High Frequency ◽  
Strain Energy ◽  
Fatigue Tests ◽  
Strain Rate Effects ◽  
Damage Resistance ◽  
Cavitation Damage ◽  
Rate Effects ◽  
Plastic Strain Energy ◽  
Hardening Factor

In order to verify the strain-rate effects on the correlation between strain energy of metals and their cavitation-damage resistance, high-frequency fatigue tests at 14.2 kcs were conducted using a magnetostriction oscillator. Utilizing Morrow’s theory, it has been shown that fatigue at this frequency can be quantitatively represented if a 15 percent reduction in static strain-hardening factor is made. This result shows that the strain-rate effects are relatively small (for the metals investigated) when plastic-strain energy is used as a criterion. Another result revealed by this study is the influence of corrosion on high-frequency fatigue and cavitation-damage resistance. Present experiments show that fatigue strength can be reduced significantly for SAE 1020 steel in 3 percent NaCl solution even at high frequencies, thus confirming earlier speculations on this aspect.

scholarly journals Comparison Between Membrane Theory and Finite Elements Analyses for Domed Shells Edged by Support Ring Beam

2013 ◽  
Vol 6 (2) ◽  
pp. 1-8
Author(s):  
Ali A.Ali ◽  
Esam A.Ebrahim ◽  
Mohammed H.Sir ◽  
Barazan A.Hamah Said
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Aluminum Alloys ◽  
Finite Elements ◽  
Shot Peening ◽  
Membrane Theory ◽  
Support Ring ◽  
Percent Elongation ◽  
Maximum Value ◽  
Hardening Factor

The present work devote the effect of shot peening time on the mechanical  properties for two aluminum alloys AA2017-T4 and AA6063-T5. The test carried out using standard tensile specimens under various shot peening times. The results showed that the increase in yield and tensile strength values. The maximum increasing at 15 minute for AA 2017-T4, and at 9 minute for AA 6063-T5. The maximum values of strain hardening factor (n) and strength factor (k) are recorded at 15 minute for AA 2017-T4 while recorded the maximum values of (n) at 24 minute and (k) at 9 minute for AA 6063-T5. The results showed that the percent elongation are increased to maximum value at 9 minute for AA 2017-T4 while the minimum value was at the same time for AA 6063-T5.

Criteria for evaluation of the hardening factor of machine parts

1989 ◽  
Vol 21 (3) ◽  
pp. 345-350
Author(s):  
V. K. Yatsenko ◽  
Yu. P. Kichaev
Keyword(s):  
Machine Parts ◽  
Criteria For Evaluation ◽  
Hardening Factor
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