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hardness of martensite is greater than bionite and fine pearlite.
Wiki User
∙ 12y ago
Wiki User
∙ 10y agoMartensite is commonly used in machine parts and forging dies. In a crystalline structure, martensite can also be used in the formation of stainless steel.
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Is martensite formed when a steel is quenched?
Martensite transformation begins when austenite is cooled below a certain critical temperature, called the matrensite start temperature. As we go below the tmartensite start temperature, more and more martensite forms and complete transformation occurs only at a temperature called martensire finish temp. Formation of martensite require that the austenite phase must be cooled rapidly.
Hardness of martensite as a function of carbon content?
60*sqrt(C)+20 HRC
Why martensite has BCT structure?
when austenite change into martensite, change in the temprature occurs(cooling). Due to this thermal stress devlop between the core and surface . Surface try to expand and core try to compress the size due to this a change in 'c' parameter take place. So a=b but not=c . this is called BCT stracture.
What are some uses of earmuffs?
some uses of earmuffs are to use them on a plane. another use is when you are in cold weather.
What are present uses for dynamite?
Explosives!! Some fireworks!! ect.
Which is the harder among them Cementite or Martensite?
Martensite
Why martensite is so hard and brittle?
For two reasons: 1. martensite is bct structure which prevent the movement of dislocations. 2. martensite has higher carbon concentraton.
Is martensite formed when a steel is quenched?
Martensite transformation begins when austenite is cooled below a certain critical temperature, called the matrensite start temperature. As we go below the tmartensite start temperature, more and more martensite forms and complete transformation occurs only at a temperature called martensire finish temp. Formation of martensite require that the austenite phase must be cooled rapidly.
Why pearlite makes steel harder?
Because Martensite transformation is almost instantaneous, the Martensite has the identical composition of the parent phase. Formation of Martensite involves a transformation from a body-centered cubic structure to body-centered tetragonal structure. The large increase in volume that results creates a highly stressed structure.
What structure forms in hypoeutectoid steel after full hardening?
Martensite
What metals that conduct electricity are brittle?
Carbon Steel - Martensite
What has the author M P Arbuzov written?
M. P. Arbuzov has written: 'Condition of martensite electrolytically isolated from quenched steel' -- subject(s): Steel, Electrolysis, Martensite, Electrometallurgy
Hardness of martensite as a function of carbon content?
60*sqrt(C)+20 HRC
Why martensitic transformation never goes to 100 percent completion?
because austenite cannot be fully converted into martensite.
What is trip steel?
TRIP steel is Transformation Induced Plasticity steel. It is a composite steel that consists of ferrite, bainite, martensite precipitants and restrained austenite. The austenite will transform into martensite when strained, thus increasing the strength of the steel. To stabilize the austenite you need to introduce alloy elements, usually Manganese.
Why martensite has BCT structure?
when austenite change into martensite, change in the temprature occurs(cooling). Due to this thermal stress devlop between the core and surface . Surface try to expand and core try to compress the size due to this a change in 'c' parameter take place. So a=b but not=c . this is called BCT stracture.
Why it is necessary to temper hardened steel immediately after quenching?
to avoid the high internal stresses caused by quenching and to get tempered Martensite that is less brittle
