A Versatile Method to Determine Thermal Limits in Grinding

Heinzel, Carsten; Sölter, Jens; Jermolajev, Štěpán; Kolkwitz, B.; Brinksmeier, E.

doi:10.1016/j.procir.2014.04.023

Cited by 25 publications

(4 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the determination of the exact time the temperature affects the workpiece material during grinding is complicated. A quantity for a rough estimation of the time of temperature impact on the workpiece surface and subsurface is the contact time t c , which in surface grinding corresponds to the geometric contact length l g divided by the tangential feed speed v ft [12,17,30]. In accordance with investigations by Takazawa [30], Figure 10 shows the observed hardness reduction as a function of the contact time for constant maximum temperatures.…”

Section: Evaluation Of Hardness Changes Due To Thermal Loadssupporting

confidence: 60%

“…Brinksmeier showed that the specific grinding power P c ", which is a process quantity, can be correlated with the residual stress at the surface of the workpiece [15]. In further works, a varied thermal effect was related to the energy partition [16], the contact time [17], and the temperature [18] during different grinding experiments.…”

Section: Introduction and State Of The Artmentioning

confidence: 99%

“…Figure17. Change of residual stress at the surface dependent on the maximum temperature gradient at the surface in consideration of metallographic cross-section analysis (blue: no visible heat-affected zone; red: visible heat-affected zone).…”

mentioning

confidence: 99%

See 2 more Smart Citations

Evaluation of Hardness and Residual Stress Changes of AISI 4140 Steel Due to Thermal Load during Surface Grinding

Kohls

Heinzel

Eich

2021

JMMP

View full text Add to dashboard Cite

During surface grinding, internal material loads are generated, which take effect on the surface and subsurface zone of AISI 4140 steel. High thermal loads can result in specific material modifications, e.g., hardness reduction and tensile residual stresses, due to inappropriate combinations of system and process parameters which influence the functional performance of the ground component in a negative way. In order to avoid this damaging impact due to the thermal effect, an in-depth understanding of the thermal loads and the resulting modifications is required. This relationship is described in the concept of Process Signatures applied in this paper. Experimentally determined temperature-time histories at various depths below the surface were used to estimate the thermal loads at the surface and subsurface using a numerical approach based on the finite element method (FEM). The results show that the hardness change during surface grinding correlates with the maximum temperature rate at given maximum temperatures. In addition, correlations between the hardness change and the Hollomon–Jaffe parameter are identified, taking into account both the absolute temperature and its evolution over time. Furthermore, it was shown that the surface residual stresses correlate with the maximum local temperature gradients at the surface if no detectable tempering of the microstructure takes place.

show abstract

Section: Evaluation Of Hardness Changes Due To Thermal Loadssupporting

confidence: 60%

Section: Introduction and State Of The Artmentioning

confidence: 99%

See 1 more Smart Citation

Evaluation of Hardness and Residual Stress Changes of AISI 4140 Steel Due to Thermal Load during Surface Grinding

Kohls

Heinzel

Eich

2021

JMMP

View full text Add to dashboard Cite

show abstract

“…by the feed speed. In this context, the development of so-called time-temperature-diagrams will provide information about the resulting surface and subsurface properties caused by a thermal impact in a specific grinding process and allows for the determination of the required process specific temperature thresholds [17]. 9.…”

Section: Discussionmentioning

confidence: 99%