Metallographic diagram of 1Cr18Ni9Ti (powder)

Analysis of Microstructure of 1Cr18Ni9Ti(Powder)

1Cr18Ni9Ti is a kind of austenitic stainless steels that contain 18 percent chromium and 9 percent nickel. It also contains titanium, which is added to improve the corrosion resistance of the material and to make it easier to work with. It has good workability and weldability, and is well suited for applications that need strength and corrosion resistance.

Due to the presence of the titanium content, 1Cr18Ni9Ti has a unique microstructure. In order to analyze its microstructure, a sample of 1Cr18Ni9Ti powder was obtained for metallographic examination. The sample was prepared by mounting the powder onto a metallographic specimen holder and polishing it using diamond suspensions and lubricants. The sample was then etched using an aqueous 3 percent nital solution at room temperature.

In order to observe the microstructure of 1Cr18Ni9Ti, a Nikon Eclipse 90i optical microscope was used. The microstructure of the material revealed a homogeneous dispersion of a fine-grained austenitic matrix composed of austenite and ferrite grains. The austenite grains in the material were found to be round with a diameter of 5-20 microns, while the ferrite grains were finer, with an average diameter of less than 5 microns. The grains were asymmetrically distributed throughout the matrix, with the austenite grains occupying more of the matrix than the ferrite grains.

The presence of titanium particles was also observed in the microstructure of the 1Cr18Ni9Ti powder. These particles appeared as discrete, white particles with a diameter of 1-5 microns. The particles were found to be uniformly distributed throughout the matrix.

The microstructure of 1Cr18Ni9Ti also revealed a homogeneous distribution of microvoids in the matrix, having a diameter of less than 1 micron. These microvoids appeared to be randomly distributed in the matrix, and their presence indicates that the material is not completely stable.

The grain boundaries of the 1Cr18Ni9Ti powder were also observed in the optical microscope, and revealed to be moderately thick. The boundaries were found to be low-stress, indicating that the material is not likely to experience significant grain growth.

The final microstructure of the 1Cr18Ni9Ti powder sample showed that the material is a fine-grained, homogeneous material composed of evenly distributed austenite and ferrite grains, with a small amount of titanium particles present. The grain boundaries of the material were found to be low-stress, indicating that it is relatively stable despite the presence of microvoids in the matrix.

Metallographic microscope was used to observe the structure of 304 stainless steel powder, the magnification was 60 times. Under the microscope, it was found that the surface of the studied material was even, without any obvious defects and inclusions. And the structures of powder were mainly rolled and deformed particles, which consisted of austenite grains and retained austenite, and also included some ferrite, carbide and a small amount of incompletely transformed martensite.The austenite grains in the 304 stainless steel powder were columnar crystalline with varying shape and size, and their grain boundaries were uneven and not well defined. The retained austenite was distributed among these austenite grains, slightly overhanging their sides and edges. The edges were sharper and finer when the retained austenite joints two austenite grains. Inside the retained austenite, some austenite grains, ferrite and carbide were present, all along the dislocation lines. The amount of ferrite and carbide was higher than in the untreated 304 stainless steel. Finally, most of the 304 stainless steel powder particles were were in a rolled and deformed state.