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Describe the ductile-to-brittle transition temperature and state how it is affected with increase in carbon content...
55. Indicate the one correct answer: The ductile-to-brittle transition temperature of carbon steels ins a increases as carbon content increases. b decreases as carbon content increases. c is always below 25°C regardless of carbon content. d both b and c. 22 Don't enter extra spaces or characters 23 at the start or end - just the letter.
8. Ductile to brittle transition: observed and a material when temperature is low.
What is ductile to brittle transition for BCC materials and what is DBT for FCC materials?
Material science 1) Polypropylene (PP) has a glass-transition temperature of -15 oC and a melting temperature of 175 oC. This means that at a temperature of -40 oC that PP is ________, and at temperature 0 oC PP is _________ . (A) brittle, brittle (B) ductile, brittle (C) brittle, ductile (D) ductile, ductile (E) low in thermal conductivity, high in thermal conductivity. .2) Galvanized steel corrodes slowly in air because: (A) the...
43. The ductile-to-brittle transition temperature is determined by a series of these tests. 44. The endurance limit for steels is determined by a series of these cyclic-loading tests. 4S. A stress-rupture diagram is a compilation of results from a number of 46. This type of test is the quickest and least expensive to conduct, and is frequently used as a quality A. Impact B. Hardness C. Fatigue D. Cree A. Impact B. Hardness C. Fatigue D. Creep tests. A. Impact...
Testing temperature, "C 4. How is the energy absorption increased improved fracture toughness) in Steels? Describe ow (see Figure 8.3). (a) Would you use 2%Mn or 0%Mn to improve the fracture toughness of the steel. (b) Should the ductile brittle transition temperature be high or low in steel to resist fractures? (C) Do you think there is dislocation motion during these experiments? If so, fast or slow? a) 27 I b ) low C. fast. O 25 Temperc 10
2. What is the carbon content of 1020 steel? How does changing the carbon content affect the properties of steel? To make a material such as steel more ductile what changes can be made to its chemical composition? (15 points) 3. What are several common point defects in metals, list 2 and provide a brief description of them? Specific to steel what is the main type of point defect and why is it important to the behavior of steel? (15...
1 BCC metals can undergo a ductile to brittle transition at certain temperatures True False 2 A fractured specimen containing Beachmarks implies that the specimen failed by creep True False 3 If a fractured component was examined and found to have 1000 beachmarks, it means that the material experienced 1000 cycles before fracture. True False
Estimate the typical carbon content of cast or ductile iron. Does that carbon fit concentration fit within the grain structure or does it exceed solubility?
Prob 7 Estimate the typical carbon content of cast or ductile iron Does that carbon fit concentration fit within the grain structure or does it exceed solubility?