tailieunhanh - Material Science_ Vol 1 of 2 - US DOE (1993) Episode 8

Tham khảo tài liệu 'material science_ vol 1 of 2 - us doe (1993) episode 8', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Properties of Metals DOE-HDBK-1017 1-93 STRESS-STRAIN RELATIONSHIP Summary The important information in this chapter is summarized below. Stress-Strain Relationship Summary Bulk Modulus The Bulk Modulus of Elasticity is the elastic response to hydrostatic pressure and equilateral tension or the volumetric response to hydrostatic pressure and equilateral tension. It is also the property of a material that determines the elastic response to the application of stress. Fracture point is the point where the material fractures due to plastic deformation. Ductile material will deform elongate more than brittle material shown in the figures within the text. The stress-strain curves discussed in this chapter for ductile and brittle demonstrated how each material would react to stress and strain. Figures 3 and 4 illustrate the specific points for ductile and brittle material respectively. Hooke s Law applies between Points 1 and 2. Elastic region is between Points 1 and 2. Plastic region is between Points 2 and 5. Rev. 0 Page 19 MS-02 PHYSICAL PROPERTIES DOE-HDBK-1017 1-93 Properties of Metal PHYSICAL PROPERTIES Material is selected for various applications in a reactor facility based on its physical and chemical properties. This chapter discusses the physical properties of material. Appendix A contains a discussion on the compatibility of tritium with various materials. EO DEFINE the following terms a. Strength d. Ductility b. Ultim ate tensile e. Malleability strength f. Toughness c. Yield strength g. Hardness EO IDENTIFY how slip effects the strength of a metal. EO DESCRIBE the effects on ductility caused by a. Temperature changes b. Irradiation c. Cold working EO IDENTIFY the reactor plant application for which high ductility is desirable. Strength Strength is the ability of a material to resist deformation. The strength of a component is usually considered based on the maximum load that can be borne before failure is apparent. If under simple tension

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