What type of phase transformation is described by a liquid phase and solid phase yielding another...
What type of phase transformation is described by a liquid phase and solid phase yielding another solid
phase composition upon cooling?
What is the strengthening mechanism for martensite?
Homework Answers
The phase transformation which is discribed by a liquid phase and solid phase yielding another solid phase is Peritectic reaction. In peritectic reaction, three phase are there in which two phases(one is liquid) react to give a new single solid phase. This is happening on cooling.
Martensite is a form of steel which is hard and crystalline in nature. Formed from austensite having face centered cubic structure. On quenching, it transforms to body centered cubic structure which is highly strained forms huge dislocations in it. This counts for the strengthening mechanism for martensite.
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What type of phase transformation is described by a liquid phase
and solid phase yielding another...
1) upon heating, one phase results in another solid phase and a liquid phase during (.........)...
1) upon heating, one phase results in another solid phase and a liquid phase during (.........) reaction.\ a) peritectic b)eutectic c)peritecid d)eutectiod 2) when steel with exactly 0.8% of carbon by weight is cooled slowly, the BCC structure of the mixture tries to revert back to its original FCC structure a) True B) False 3) the line above which the alloy liquid is called? a) liquid line b)tie line c) solidous line d) lever line
3. Some strengthening effects can be reduced by a. Surface polishing b. Heat treatment c. None...
3. Some strengthening effects can be reduced by a. Surface polishing b. Heat treatment c. None of the above 4. When considering isomorphous phase diagrams, a phase is: a. liquid, solid or gas b. a homogeneous portion of a system that has uniform physical and chemical characteristics C. FCC, BCC or HCP 5. On equilibrium phase diagrams, the lever rule is used to find: a. The composition of each phase b. The amount of each phase C. The phases present...
Incorrect Question 7 0/0.5 pts What are the eutectic properties for the the binary liquid-solid phase...
Incorrect Question 7 0/0.5 pts What are the eutectic properties for the the binary liquid-solid phase diagram of the naphthalene-diphenylamine system? The eutectic termperature is the highest melting point. The eutectic temperature depends on the molar fraction of naphtalene. The eutectic temperature never changes. The eutectic composition depends on pressure. The eutectic termperature depends on pressure. The eutectic composition never changes. The eutectic composition depends on the molar fraction of naphtalene.
2. (25 pts) A substance is changing phase from a solid to liquid. What are the...
2. (25 pts) A substance is changing phase from a solid to liquid. What are the signs for AH and AS? Under what conditions is this phase change spontaneous?
2. [20pt] Consider the temperature-composition phase diagram shown below, which represents a solid-liquid equilibrium based on...
2. [20pt] Consider the temperature-composition phase diagram shown below, which represents a solid-liquid equilibrium based on a (liquid) mixture of A and B at high temperature. Temperature, T DY 0.16 0.23 0.57 0.67 0.84 0.2 0.8 0.4 0.6 Mole fraction of B, XE (a) Label all regions of the diagram according to the chemical species exist in that region and their phases. Be precise the composition of solid formed. (10pt) (b) Indicate the number of species and phases present at...
A copper-nickel alloy of composition (40% Ni-60% Cu) is slowly heated from a temperature of 1200°C: 1. a) At what temperature does the first liquid phase form? b) What is the composition of this liq...
A copper-nickel alloy of composition (40% Ni-60% Cu) is slowly heated from a temperature of 1200°C: 1. a) At what temperature does the first liquid phase form? b) What is the composition of this liquid phase? c) At what temperature does complete melting of the alloy occur? d) What is the composition of the last solid remaining prior to complete melting? Composition (at% N) 100 0 1600 2800 1500 1453°C Liquid 2600 Soldus line Liquidus line 1300 - 2200 120아ㅡㅡㅡㅡㅡ...
What is the composition of a liquid for which the vapor phase above the liquid has...
What is the composition of a liquid for which the vapor phase above the liquid has a pressure of 355 torr at 25 degree C? Pentane mole fraction in the vapor = Hexane mole fraction in the vapor =
What is the composition of a liquid for which the vapor phase above the liquid has...
What is the composition of a liquid for which the vapor phase above the liquid has a pressure of 435 torr at 25°C? Vapor Pressures at 25°C Pure pentane 511 torr Pure hexane 150. torr Pentane mole fraction in the liquid = Hexane mole fraction in the liquid =
Due date: April 7, 2020 200 Solubaty limit- Homework #7 (Chapter 9: Phase Diagrams) 150 Liquid...
Due date: April 7, 2020 200 Solubaty limit- Homework #7 (Chapter 9: Phase Diagrams) 150 Liquid solution Ganes Solution sugar 100 1 50 1. Consider the Cu-Ni binary Liquid solution (syrup) phase diagram (see the following old figure) and answer the questions: A copper-nickel alloy of composition 70 wt% Ni-30 wt% 207 Cu is slowly heated from a temperature of 1300°C. Il (a) At what temperature does the Sugar 60 80 Water 100 first liquid phase form? (b) What is...
8.18. A liquid phase sintered material is synthesized with a solid-solid grain boundary energy of 0.80...
8.18. A liquid phase sintered material is synthesized with a solid-solid grain boundary energy of 0.80 J/m2, solid-liq- uid interfacial energy of 0.45 J/m2, and grain diameter of 20 um. What is the average size of the solid-solid necks in the sintered microstructure?
3. Some strengthening effects can be reduced by a. Surface polishing b. Heat treatment c. None of the above 4. When considering isomorphous phase diagrams, a phase is: a. liquid, solid or gas b. a homogeneous portion of a system that has uniform physical and chemical characteristics C. FCC, BCC or HCP 5. On equilibrium phase diagrams, the lever rule is used to find: a. The composition of each phase b. The amount of each phase C. The phases present...
Incorrect Question 7 0/0.5 pts What are the eutectic properties for the the binary liquid-solid phase diagram of the naphthalene-diphenylamine system? The eutectic termperature is the highest melting point. The eutectic temperature depends on the molar fraction of naphtalene. The eutectic temperature never changes. The eutectic composition depends on pressure. The eutectic termperature depends on pressure. The eutectic composition never changes. The eutectic composition depends on the molar fraction of naphtalene.
2. (25 pts) A substance is changing phase from a solid to liquid. What are the signs for AH and AS? Under what conditions is this phase change spontaneous?
2. [20pt] Consider the temperature-composition phase diagram shown below, which represents a solid-liquid equilibrium based on a (liquid) mixture of A and B at high temperature. Temperature, T DY 0.16 0.23 0.57 0.67 0.84 0.2 0.8 0.4 0.6 Mole fraction of B, XE (a) Label all regions of the diagram according to the chemical species exist in that region and their phases. Be precise the composition of solid formed. (10pt) (b) Indicate the number of species and phases present at...
A copper-nickel alloy of composition (40% Ni-60% Cu) is slowly heated from a temperature of 1200°C: 1. a) At what temperature does the first liquid phase form? b) What is the composition of this liquid phase? c) At what temperature does complete melting of the alloy occur? d) What is the composition of the last solid remaining prior to complete melting? Composition (at% N) 100 0 1600 2800 1500 1453°C Liquid 2600 Soldus line Liquidus line 1300 - 2200 120아ㅡㅡㅡㅡㅡ...
What is the composition of a liquid for which the vapor phase above the liquid has a pressure of 355 torr at 25 degree C? Pentane mole fraction in the vapor = Hexane mole fraction in the vapor =
Due date: April 7, 2020 200 Solubaty limit- Homework #7 (Chapter 9: Phase Diagrams) 150 Liquid solution Ganes Solution sugar 100 1 50 1. Consider the Cu-Ni binary Liquid solution (syrup) phase diagram (see the following old figure) and answer the questions: A copper-nickel alloy of composition 70 wt% Ni-30 wt% 207 Cu is slowly heated from a temperature of 1300°C. Il (a) At what temperature does the Sugar 60 80 Water 100 first liquid phase form? (b) What is...
8.18. A liquid phase sintered material is synthesized with a solid-solid grain boundary energy of 0.80 J/m2, solid-liq- uid interfacial energy of 0.45 J/m2, and grain diameter of 20 um. What is the average size of the solid-solid necks in the sintered microstructure?
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