8. Ductile to brittle transition: observed and a material when temperature is low.
Describe the ductile-to-brittle transition temperature and state how it is affected with increase in carbon content in steel.
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...
What is ductile to brittle transition for BCC materials and what is DBT for FCC materials?
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.
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...
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
6. (a) Name a conductor, an insulator, a semiconductor, a ductile material and a brittle material. (b) What are the units of electrical conductivity and ductility? (c) What is the difference between 24 carat gold and 18 carat gold in gold purity? (d) What is the benefit of alloying gold with copper in gold rings? I
Because of it's tensile strength, steel is considered a ________ material. a) Brittle b) Ductile c) Flexible
What may be a simple test method to differentiate between brittle and ductile fracture? Discuss the effects of temperature and loading rate
answer question 2 please A material may fail in many ways; in a ductile or brittle mode; by creep or fatigue; by corrosion or stress corrosion; by hydrogen or liquid metal embrittlement; by slow tensile overload or by impact. An examination of the failure may tell you a lot about the material and the failure mode. In this course, you have learned (we trust) the correlations between structure-properties, - applications. This leads to material selection. However, the engineer has to...