Stainless steel powder metrology Thesis Example | Topics and Well Written Essays - 2000 words

Stainless steel powder metrology - thesis ExamplePROCEDURE The mixtures underwent a complete outgrowth to obtain the results and compare them according to unalike standards. The procedure of the experiment is explained in detail in this go against of the report. Preparation of the Mixture The powder mixture, each pattern separately, is weighed and the weight recorded. The wait on is initiated after the weighing. The powder is properly mixed using tubes and revolving machine. In these experiments, two different mixtures, ferrous 316L with 1 gram silicon and the same mixture with the addition of 1gm boron is use. The mixtures were then sintered and quenched under different temperature conditions. The sintering has to be discussed briefly to be unders tood. Sintering and Quenching The specimens prepared are pressurized at 700 MPa and made into round discs as shown in the picture below. . The specimen is heated inside a unsympathetic container, to different temperature. As record ed earlier, there are in total 13 specimens which are apply in the experiment. Each specimen is labeled properly before whatsoever kind of experiment us conducted on it. The two mixtures ingests of A and B are heated at 1220, 1230, 1235, 1240, 1280, and 1295o C respectively. Each warning was then sectioned, mounted and polished for microscopical examination. These methods are explained in detail in the following part of the report. Sectioning It is essential for maximizing the working parameters since incorrect cutting can waste small samples, which are very(prenominal) difficult to make. The sample with deformation should be given maximum support to un-clamp them (German, 1990). Mounting The samples are too little in size to handle the different steps of the procedure. It is essential for maximizing the working parameters. wherefore a uniform and rounded surface is given to the specimen so that the damage is prevented during grinding and shining procedures (German, 1990). G rinding The samples are grounded to reach finer surfaces. Grinding is done under stream of water to clear up any free particles that are being cut out of the sample and to minimize the eroding ready on the sample and to save its surface from rash cuts. The specimen is then dried out as there was water on it (German, 1990). Polishing It is also a very important part of the experiment. Since for the picture taking the best surface is required. It is done by rotating a cloth over the surface with the help of a polishing machine. A polishing liquid is also used (German, 1990). Etching The samples need to be sculptured as the last part of the procedure. But before etching is done, the surface has to be cleaned and free of any impurity. The samples have to be etched with a proper liquid to prevent damage. During the process, the sample is removed from the sample when the first blooms of grains are observed. After etching, the samples are washed ruinously with washing material, either water or alcohol. Warm air is then passed over it. If the material is of soft nature, it must be covered so the surface can be saved (German, 1990). Microscopic examination This is a very important process since the examination with naked eye would not reveal the required results. Special method of illumination is used between the two controlling diaphragms to enlighten the eye piece where the results can be seen and photographed (German, 1990). Recording before the Procedure The two