scholarly journals Austempered Ductile Iron (ADI) for gears: Contact and bending fatigue behavior

2018 ◽  
Vol 8 ◽  
pp. 14-23 ◽  
Author(s):  
Franco Concli
Keyword(s):  
Ductile Iron ◽  
Fatigue Behavior ◽  
Austempered Ductile Iron ◽  
Bending Fatigue

The Evaluation of Bending Fatigue Testing of Austempered Ductile Iron Spur Gear

2019 ◽  
Author(s):  
Qi Zhang ◽  
Jianhua Lv ◽  
Rizwanulhaque Syed ◽  
Jing Zhang ◽  
Yang Xu ◽  
...  
Keyword(s):  
Fatigue Strength ◽  
Ductile Iron ◽  
Fatigue Testing ◽  
Spur Gear ◽  
Austempered Ductile Iron ◽  
Spur Gears ◽  
Reliability Design ◽  
Bending Fatigue ◽  
Bending Fatigue Strength ◽  
Number Of Cycles

Abstract An experimental evaluation of bending fatigue strength for austempered ductile iron (ADI) spur gears have been performed using Zwick fatigue tester. The gear material was manufactured by vertically continuous casting, in which the radius of the graphite grains is smaller. The Stress-Number of Cycles curve (S-N curve) for the bending fatigue strength of the ADI spur gears are manufactured without any specific surface treatments, and have been obtained by post-processing software. It was observed that when the reliability was 50%, the fatigue limit was 304.89 MPa. It has provided a reliable basis to rate the reliability design of the small gearboxes in automation later.

scholarly journals Contact Fatigue Strength of Austempered Ductile Iron (ADI) in Gear Applications

Metals ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1147
Author(s):  
Fabian Goergen ◽  
Dieter Mevissen ◽  
Stefano Masaggia ◽  
Enrico Veneri ◽  
Jens Brimmers ◽  
...  
Keyword(s):  
Ductile Iron ◽  
Fatigue Behavior ◽  
Contact Fatigue ◽  
Austempered Ductile Iron ◽  
Specific Point ◽  
Iron And Steel ◽  
Contact Fatigue Strength ◽  
Steel Castings ◽  
Short Time ◽  
Internal Gear

Austempered Ductile Iron (ADI) is widely implemented to achieve lightweight and optimized components in power transmissions (e.g., internal gear in planetary stages), by substituting steel castings or a combination of Ductile Iron and steel-assembled structures. In this paper, the contact fatigue of two ADI grades (ADI J/S900-8; ADI J/S1200-3) is investigated by disk-on-disk tests. The disk-on-disk contact is an analogy model of the tooth contact and represents the tribological conditions at a specific point on the path of contact. The experimental results cover the endurance limit as well as the short time fatigue behavior for both ADI variants. In addition, the pitting characteristics and microstructural changes are analyzed in order to get a further understanding of the fatigue behavior of ADI.

Contact and bending fatigue behaviour of austempered ductile iron gears

2017 ◽  
Vol 232 (6) ◽  
pp. 998-1008 ◽  
Author(s):  
Carlo Gorla ◽  
Edoardo Conrado ◽  
Francesco Rosa ◽  
Franco Concli
Keyword(s):  
Ductile Iron ◽  
Contact Fatigue ◽  
Research Programme ◽  
Fatigue Behaviour ◽  
Fatigue Tests ◽  
Austempered Ductile Iron ◽  
Fatigue Properties ◽  
Bending Fatigue ◽  
Metallurgical Analysis ◽  
Single Tooth

In the present paper a research programme aimed at investigating both the bending and contact fatigue properties of an austempered ductile iron applied to gears is presented, in order to determine reliable values of the limits, which take into account the influence of the production process, to be applied in the design of gearboxes. The bending fatigue tests are performed according to the single tooth fatigue approach and the pitting tests are performed with a back-to-back rig. Metallurgical analysis is performed on the failed specimens, in order to understand the origin and the propagation of the failures and to appreciate the influence of the micro-structure on the performances obtained.

Rolling contact fatigue behavior of dual-phase austempered ductile iron

Wear ◽  
2019 ◽  
Vol 418-419 ◽  
pp. 208-214 ◽  
Author(s):  
Diego A. Colombo ◽  
Ricardo C. Dommarco ◽  
Alejandro D. Basso
Keyword(s):  
Ductile Iron ◽  
Fatigue Behavior ◽  
Rolling Contact Fatigue ◽  
Contact Fatigue ◽  
Rolling Contact ◽  
Austempered Ductile Iron ◽  
Dual Phase
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