A study on the initiation processes of white etching cracks (WECs) in AISI 52100 bearing steel

Wear ◽  
2021 ◽  
pp. 203864
Author(s):  
J. Spille ◽  
J. Wranik ◽  
S. Barteldes ◽  
J. Mayer ◽  
A. Schwedt ◽  
...  
Author(s):  
Akeem Yusuf Adesina ◽  
Muzafar Hussain ◽  
Abbas Saeed Hakeem ◽  
Abdul Samad Mohammed ◽  
Muhammad Ali Ehsan ◽  
...  

2019 ◽  
Vol 891 ◽  
pp. 269-274 ◽  
Author(s):  
Prakorb Chartpuk ◽  
Chaiwat Chaimahapuk

The ultrasonic mold was designed for the ceramic powder compression. CAD and CAE were used in the design to analyze the mold strength and its natural frequency. The study of stress distribution and compression in upper and lower punch, mold body and waveguide comparison of stresses was analyzed by FEA experiments under maximum compression at 50,000 N to validate the results of both methods and the mold natural frequency. The difference between FEA and experimental analysis was 3-7%, acceptable. The redesign results in a cylindrical mold body with the outer diameter of 80 mm, the height of 100 mm, and the upper punch of 125 mm in length. The six sides are 26 mm of the high waveguide with 100 mm height. The internal and external diameters are 80 and 110 mm, respectively. The mold has been redesigned and can support the maximum compression force of 1,500 kN. with the bearing steel, AISI 52100, obtainable hardness 65 HRC, the stress concentration occurs at the neck of the upper punch using the ultrasonic at 12.00 to 12.45 kHz.


2010 ◽  
Vol 14 (1) ◽  
pp. 128-147 ◽  
Author(s):  
D. Umbrello ◽  
A. D. Jayal ◽  
S. Caruso ◽  
O. W. Dillon ◽  
I. S. Jawahir

Author(s):  
Jun Qu ◽  
Peter J. Blau ◽  
Dong Zhu ◽  
Bruce A. Cook ◽  
Alaa A. Elmoursi

This study investigated the friction and wear characteristics of two super-hard coatings on M2 steel. One was AlMgB14, produced by pulsed laser deposition (PLD), and the other was a nanocomposite of AlMgB14-TiB2, produced by physical vapor deposition (PVD). Tests were conducted under unidirectional and reciprocating sliding against AISI 52100 bearing steel in both dry and oil-lubricated conditions. The AlMgB14 coating exhibited an encouraging but short-lived low friction stage (μ = 0.2) in dry sliding. The AlMgB14-TiB2 coating reduced the wear rates by one order of magnitude relative to the M2 steel and three orders of magnitude for the counterface in dry sliding. This nanocomposite coating also demonstrated significant extension (>2.5X) of the low friction (non-scuffing) stage when sliding under starved lubrication.


2016 ◽  
Vol 879 ◽  
pp. 164-168
Author(s):  
Auezhan Amanov ◽  
Jun Hyong Kim ◽  
Young Sik Pyun

In this study, two different AISI 52100 bearing and D2 tool steels were subjected to ultrasonic nanocrystalline surface modification (UNSM) technique at ambient and high temperature of 500 °C. The objective of this study is to characterize the microstructure and to investigate the effectiveness of UNSM technique on the friction and wear behavior of those steels. The friction and wear behavior of the specimens against AISI52100 bearing steel ball with a diameter of 10 mm was carried out using a micro-tribo tester under dry conditions. The hardness with respect to depth from the top surface was measured using a microhardness. The change in the microstructure of the specimens before and after UNSM treatment was characterized by scanning electron microscopy (SEM). The findings from this preliminary study are expected to be implemented to the bearings and tools to increase the efficiency and performance of the components.


2017 ◽  
Vol 14 (2) ◽  
pp. 133-140
Author(s):  
Anael Preman Krellin ◽  
Julio César Giubilei Milan ◽  
César Edil da Costa ◽  
Elisangela Aparecida dos Santos Almeida ◽  
Alexandre Galiotto

Materials ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 5440
Author(s):  
Paweł Zmarzły

The paper features the development of multi-dimensional mathematical models used for evaluating the impact of selected factors on the vibration generated by 6304ZZ type rolling ball bearings from three manufacturers in the aspect of the wear process. The bearings were manufactured of AISI 52100 bearing steel. The analyzed factors included the inner and outer raceways’ roundness and waviness deviations, radial clearance and the total curvature ratio. The models were developed for vibration recorded in three frequency ranges: 50–300 Hz, 300–1800 Hz and 1800–10,000 Hz. The paper includes a specification of the principles of operation of innovative measuring systems intended for testing bearing vibration, raceway geometries and radial clearance. Furthermore, it features a specification of particular stages of the multi-dimensional mathematical models’ development and verification. Testing with the purpose of statistical evaluation of the analyzed factors is also presented. The test results and mathematical models indicate that the inner raceway’s waviness deviation had a dominant impact on the vibration examined in all frequencies. The roundness and waviness deviation of bearing raceways made of AISI 52100 steel propagates the bearing wear process.


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