THE RESEACH OF THE EVALUATION METHOD OF MEASUREMENT UNCERTAINTY FOR PHYSICAL TESTING AND CHEMICAL ANALYSIS OF MATERIALS

With the aim to improve the reliability of measurement uncertainty in laboratory of physical testing and chemical analysis for materials,it is proposed that diverse evaluation procedures should be adopted dealing with the relative testing parameters. Considering the parameters in the scope of metallic mechanical properties as samples,direct evaluation procedure is desired for the tensile and Vickers hardness testing,whereas synthetic evaluation procedure is of competence for impact,Brinell and Rockwell hardness testing. Moreover,when performing synthetic evaluation procedure,most of the difficulties existing in the evaluation process related to the physical testing and chemical analysis of metallic materials could be solved satisfactorily.