Browse Publications Technical Papers 2018-01-1410
2018-04-03

Development of a Thermal Fatigue Test Bench for Cylinder Head Materials 2018-01-1410

An innovative specimen design and test system for thermal fatigue (TF) analysis is developed to compare the fatigue behavior of different cylinder head materials under realistic cyclic thermal loadings. Finite element analyses were performed to optimize the specimen geometry and thermal cycles. The reduced section of the TF specimen is heated locally by a high frequency induction heater and cooled by compressed air. The mechanical strain is then induced internally by the non-uniform thermal gradient generated within the specimen to closely simulate what valve bridges in cylinder heads experience in real operation. The resulting fatigue life is a function not only of the inherent fatigue resistance of the alloys, but also of other relevant properties such as thermal conductivity, modulus of elasticity, and coefficient of thermal expansion. This test is an essential tool for comparing different alloys for thermal fatigue applications. In this paper, four aluminum alloys were tested to investigate the effect of the compositional change and heat treatment on the thermomechanical performance. The test method and results will be presented in detail.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 16% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
TECHNICAL PAPER

Influence of Microstructure on the Static and Thermal Fatigue Properties of 319 Alloys

970705

View Details

TECHNICAL PAPER

INFLUENCE OF THE FORMING PROCESS ON CRASH AND FATIGUE PERFORMANCE OF HIGH STRENGTH STEELS FOR AUTOMOTIVE COMPONENTS

2002-01-0642

View Details

STANDARD

Qualifying Aftermarket Two-Component Structural Foams

J2621_201910

View Details

X