Author
G. Guilhot
Bio: G. Guilhot is an academic researcher. The author has an hindex of 2, co-authored 2 publications receiving 48 citations.
Papers
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TL;DR: In this paper, the friction and wear behaviour of sintered iron parts were compared with conventional material used for the same applications and almost the same wear behaviour was found, however, differences were found concerning resistance to seizure, friction coefficient and the influence of surface preparation before tests.
32 citations
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TL;DR: In this paper, the evolution of the dry sliding wear resistance of a sintered Distaloy AE with increasing total vol.% porosity (in the range 9 − 22 vol%) was studied.
80 citations
TL;DR: In this article, the role of porosity on the wear behavior of sintered iron was investigated and it was found that the wear mechanism is delamination or mechanical wear, which is basically similar to that of wrought materials according to subsurface crack generation and crack propagation processes.
Abstract: The role of porosity on the wear behaviour of sintered iron was investigated. Sintered iron was used in preference to steel because the various alloy additions and matrix heterogeneity in the latter might affect the microwear behaviour and the role of porosity. The wear tests were performed in a pin on disc test bed under 10-40 N loads at 0·56 m s-1 sliding speed in air. For the given tribological conditions, it was found that the wear mechanism is delamination or mechanical wear, which is basically similar to that of wrought materials according to subsurface crack generation and crack propagation processes. However, the open pores on the surface act as a site for generation and collection of wear debris. Furthermore, the pores affect the stress distribution and the metal deformation of subsurface layers during dry sliding. Accumulation of the plastic shearing on the subsurface results in nucleation of cracks that further grow by shearing: the fracture process. The propagation of subsurface cracks...
64 citations
TL;DR: In this article, the unlubricated wear of sintered pure iron has been investigated under different sliding conditions using a dynamic wear rig operating in the scanning electron microscope and a simple pin-on-disk apparatus operating in air.
62 citations
TL;DR: In this paper, micro-abrasion tests were conducted under constant load and speed conditions while special emphasis was given to the nature of the abrasive; two exogenous (Al 2 O 3 and SiO 2 ) and one endogenous abrasive (Fe 2 O3 ) were used.
45 citations
TL;DR: Ashby's map for dry sliding wear of wrought steels has been used as a guide to interpret the dry sliding wearing behaviour of PM materials as mentioned in this paper, which has been shown that this map is useful in understanding the acting wear mechanisms and also the experimental wear rates.
Abstract: Ashby's map for dry sliding wear of wrought steels has been used as a guide to interpret the dry sliding wear behaviour of PM materials. It has been shown that this map is useful in understanding the acting wear mechanisms and also the experimental wear rates. For given tribological conditions, in terms of normalised pressure and sliding velocity, the sliding wear resistance of PM materials is similar to that of wrought steels, although a closer look at the experimental results highlights the peculiar role of porosity and of a heterogeneous microstructure. In particular, materials with a porosity content of about 10% and with an homogeneous microstructure display the best performances. Since mild wear in metals can be obtained through the formation of protective oxide glazes, steam treatment turned out to be a natural way of increasing the sliding wear resistance of PM ferrous materials. The ‘surface durability’ of steam treated materials was thus shown to depend on the quality of the layer, the a...
36 citations