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Mechanical Properties of Materials MM M 2 20

Mechanical Properties of Materials MM M 2 20. Ali Osman Kurt (M.Sc. and Ph.D. in Materials Science) www.aokurt.sakarya.edu.tr. Test Methods. Processing. Structure. Properties. Introduction Relationship s in Materials Science. are evaluate by. Properties. TESTING. Properties. named as.

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Mechanical Properties of Materials MM M 2 20

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  1. Mechanical Properties of MaterialsMMM 220 Ali Osman Kurt (M.Sc. and Ph.D. in Materials Science) www.aokurt.sakarya.edu.tr Test Methods

  2. Processing Structure Properties IntroductionRelationships in Materials Science

  3. are evaluate by Properties TESTING Properties named as tension, compression, hardness, bending, torsion, high strain rate, creep, fatigues, fracture, corrosion, formability, wear, and some others.

  4. Testing • Each test should / may be carried out according to a standard, i.e. a set of instruction to follow in order to obtain data useful to drive the materials properties.

  5. Sample: Tension Testing “Tension Testing consists of subjecting a prepared specimen of special size and shape, or a full-size specimen, to a gradually increasing uniaxial load (stress) until failure occurs.”1 1: C.S. Barrett, Crystal Structure of Metals, ASM Handbook, Volume 8, Metallography and Microstructures, ASM International, 1990, in ASM Handbook on DVD, ASM International and The Dialog Corporation, 1999.

  6. Tension Testing and Results

  7. Sample: Hardness Testing “Hardness test is the measures of the material to penetration by a sharp object”1” Common hardness tests are Brinell, Rockwell and Vickers. 1: Donald R. ASKELAND, "The science and engineering of materials“, 3rd Edi., p147, 2003.

  8. Hardness Testing - Brinell Brinell hardness test: A hard steel ball (usually 10 mm in diameter) is used. 3000 kg – Cast iron and steel 500 kg – Nonferrous alloys

  9. Hardness Testing - Rockwell Rockwell hardness test: A diamond cone (120o) and hard carbide (or steel balls) usually 1/16 in. (1.5875mm) or 1/8 in. (3.175mm) in diameter are used. RA – 60 kg – Very hard materials RB – 100 kg – Brass, low strength steels RC – 150 kg – High-strength steels RD – 100 kg – High-strength steels RE – 100 kg – Very soft materials RF – 60 kg – Al, soft materials

  10. Hardness Testing - Vickers Vickers hardness test is a microhardness test. A diamond pyramid (136o) is used for indentation. 10 kg – Hard materials (such as ceramics)

  11. Conclusions • Materials properties are effected by its structure and processing method(s). • Required properties are checked by a set of pre-determined instructions, which are formally named standard for testing.

  12. End of The Section

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