Research Project

Increasement of the fatigue strength under HCF and VHCF stress due to thermomechanical treatment in the temperature range of the maximum dynamic strain aging

Personal Details

• 10/2009 – 02/2015: Mechanical Engineering studies at the University of Kaiserslautern, Discipline: Vehicle technology, Materials and Production
• 04/2015 – 09/2018: Master program of mechanical engineering at the University of Kaiserslautern, Discipline: Materials and Manufacturing Engineering
• Since 12/2018: Research Assistant at Working Group Materials Testing

Publications

• J.Sippel, E.Kerscher:
  Influence of fracture toughness and defect size on vibration characteristics and resulting stress amplitude of AISI 52100 and AISI 4140 during ultrasonic fatigue testing
  In: Procedia Structural Integrity 47 (2023), 608-616.
  DOI: doi.org/10.1016/j.prostr.2023.07.062
• J.Sippel, E.Kerscher:
  Influence of a Thermomechanical Treatment on the Lifetime of a High Strength Steel in Very High Cycle Fatigue
  AIP Conference Proceedings 2848, 020014 (2023).
  DOI: doi.org/10.1063/5.0145133
• A. Khayatzadeh, J. Sippel, S. Guth, K.-H. Lang, E. Kerscher: 
  Influence of a Thermo-Mechanical Treatment on the Fatigue Lifetime and Crack Initiation Behavior of a Quenched and Tempered Steel
  Metals 2022, 12 (2), 204.
  DOI: https://doi.org/10.3390/met12020204
• L. Simo Kamga, J. Sippel, M. Oehler, M. Gedan-Smolka, B. Sauer:
  Einfluss des Substratmaterials bei der Transferschmierung von Stahl-Bronze-Kontakten mit PA66-PTFE-cb Trockenschmierstoffen
  Tribologie und Schmierungstechnik 69 (2022), Heft 4, pp. 5-11,
  DOI: doi.org/10.24053/TuS-2022-0018.
• L. Morales-Rivas, F. Ram, D. Spriestersbach, J. Sippel, M. De Graef, E. Kerscher:
  Fine granular area linked to very high cycle fatigue in martensitic and bainitic steels: Characterization by means of EBSD-dictionary indexing.
  Scripta Materialia, Volume 194, 2021, 113644.
  DOI: doi.org/10.1016/j.scriptamat.2020.113644.
• J.P. Sippel, E. Kerscher:
  Properties of the Fine Granular Area and Postulated Models for Its Formation during Very High Cycle Fatigue – A Review.
  Applied Sciences,10(23), 8475, 2020.
  DOI: doi.org/10.3390/app10238475.

Presentations

• J.Sippel (V), E.Kerscher:
  Influence of fracture toughness and defect size on vibration characteristics and resulting stress amplitude of AISI 52100 and AISI 4140 during ultrasonic fatigue testing
  27th International Conference on Fracture and Structural Integrity, Rome, 21.-24. Februar 2023.
• J.Sippel (V), E.Kerscher:
  Influence of a Thermomechanical Treatment on the Lifetime of a High Strength Steel in Very High Cycle Fatigue
  20th International Conference on Fracture and Damage Mechanics, Malaga, 5.-7. September 2022.
• J.P. Sippel (V), Amin Khayatzadeh, KH. Lang, E. Kerscher: :
  Steigerung der Ermüdungsfestigkeit bei HCF- und VHCF-Beanspruchung durch eine thermomechanische Behandlung im Temperaturbereich der maximalen dynamischen Reckalterung.
  Werkstoffwoche 2019, Dresden, 18.-20. September 2019.

Supervised Student Research Projects

• L. Altmann, W. Klein: Bewertung der Einschlussverteilung hochfester Stähle nach einer thermomechanischen Behandlung im Temperaturbereich der maximalen dynamischen Reckalterung (2022)
• L. Mißler: Vergleichende Bruchflächenbewertung von 42CrMo4 nach servohydraulischer und Ultraschall-Ermüdungsprüfung im Bereich der Lanzeitfestigkeit (2022)
• P. van Riel: Konstruktion einer in situ Mikro-Zug und Druckeinheit (2019/20)