Investigation of the Structure of Hard Alloys That Have Undergone Bulk Pulsed Laser Hardening Using X-Ray Structural Analysis

Igor Pinahin,Svetlana Vrublevskaya,Maria Shpack,Michael Yagmurov,S Bratan,S Roshchupkin

doi:10.1051/matecconf/202134602003

Igor Pinahin, Svetlana Vrublevskaya + Show 4 more

Open Access

https://doi.org/10.1051/matecconf/202134602003

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Abstract

The main principles of volumetric pulsed laser hardening method are presented in the article. The results of experiments based on tensometry with further processing using the LabVIEW system are shown. Obtained results confirm the appearance of the mechanical shock wave in materials due to the action of a single high-energy laser pulse. The received dependences were confirmed for hard alloys with different chemical compositions. Using of X-ray structural analysis allowed to establish that various hard alloys processed by pulsed laser hardening characterized by the third kind (nanostructure) changing the structure due to the accumulation of structural defects (sizes of mosaic blocks, crystal microscopic distortions, density of dislocations). It has been established that the third kind changing the structure increases the main service mechanical properties of hard alloys (microhardness, abrasive wear resistance, flexing strength). In addition, it was found that the change in the hard alloys properties is directly proportional to the change in the nanostructure of materials.

Highlights

For these products groups it is advisable to apply hardening methods, in which the structure and properties modification extends to a certain local depth into the body material. It maintains the operability over the spectrum of permissible wear values. These methods include the method of volumetric pulsed laser hardening (VPLH), which was developed at the Mechanical Engineering and Technological Equipment Department of the North Caucasus Federal University and showed positive results in laboratory tests and in production conditions during the hardening carbide cutting tools process [9, 10]
The action mechanism is a shock wave that is excited in the material under the single high-energy laser pulse treatment
Earlier in laboratory research it was determined that at the first stage of the VPLH the laser pulse energy is transformed into the thermal energy of the hardenable material [11]

Summary

Introduction

Https://doi.org/10.10 51/matecconf /202134602003 in geometric parameters (wear, dulling, etc.). This method allows modifying the structure and increasing the mechanical properties of materials to a depth of 30 - 40 millimeters. The action mechanism is a shock wave that is excited in the material under the single high-energy laser pulse treatment.

Results

Conclusion