Superficial Distortion Influence on Characteristics of the Iron-Based Materials
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ABSTRACT:
The surfaces superficial distortion process is applied on materials in order to improve the quality, and especially, some mechanical properties. The material surface is in a situation of intense metalworking accompanied by the presence of specific remnant tensions after the process is applied. In addition, the application of the process to the synthesized materials leads to pores closing and by dismissing their negative effect on some properties. Metalworking through rolling or gritting of synthesized materials leads to an important increasing of tiredness resistance.
The effect of rolling on materials properties depends, in an important measure, by the parameters of the process (contact pressure and process length) and by the material structure. Until now, based on technical considerations, the rolling process was applied just on cylindrical samples.
The aim of the paper is to present some experimental results of plane surfaces metalworking influences on synthesized steel properties obtained from different powders blend. There has been observed that some properties (e.g. toughness, traction and flexion resistance) were improved with increasing of the length of rolling, but the relationship was not linear. The materials with a higher plasticity suffer a more intense metalworking process with positive consequences on mechanical properties of interest.
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