Why is martensite so hard

You take a huge swing at the enemy, who meets your blow with his sword, and your sword shatters into several pieces. As a result, the swords were strong, but brittle. Their lack of toughness meant that they could not absorb much of an impact before fracturing. Want to learn more about steel metallurgy? See our metallurgy courses page. Tempering is used to improve toughness in steel that has been through hardened by heating it to form austenite and then quenching it to form martensite.

At these temperatures the martensite decomposes to form iron carbide particles. Shiv Shankar Copper. Because movement of carbon atom gets restricted in octahedral void Read more How Martensite formation takes place?

I hope it helps. Thank you!! Formation of niddle like crystal called accicular ferrie it is very hard and brittle Formation of niddle like crystal called accicular ferrie it is very hard and brittle See less. Mohamad Afzal Khan Gold. Leave an answer. Cancel reply. Image Select file Browse. Askmemetallurgy website uses cookies to improve your experience. Close Privacy Overview This website uses cookies to improve your experience while you navigate through the website.

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You also have the option to opt-out of these cookies. Sulphur is a desirable element in steel when good machinability is required from the steel product. It forms undesirable sulphides which promotes granular weakness and cracks in steel during solidification. The purpose of removing the sulfur is to reduce the SO2 emissions. The HDS process involves catalytic treatment with hydrogen to convert the various sulfur compounds present to hydrogen sulfide.

Flue gas desulfurization FGD is a set of technologies used to remove sulfur dioxide SO2 from exhaust flue gases of fossil-fuel power plants, as well as from the emissions of other sulfur oxide emitting processes. Question Types There should be three types of questions in a focus group discussion: Probe questions: these introduce participants to the discussion topic and make them feel more comfortable sharing their opinion with the group.

Wet scrubbing using a slurry of alkaline sorbent, usually limestone or lime, or seawater to scrub gases; Spray-dry scrubbing using similar sorbent slurries; Dry sorbent injection systems that introduce powdered hydrated lime or other sorbent material into exhaust ducts to eliminate SO2 and SO3 from process emissions.

The sorbent reacts with SO2 and forms an aqueous slurry of calcium sulphite. Begin typing your search term above and press enter to search. Press ESC to cancel. Skip to content Home Philosophy Why is martensite so hard?

Ben Davis March 23, Why is martensite so hard? What is the shape of soft martensite phase is? What is the hardest phase of Fe C system? Why is Cementite brittle? What is FE-C diagram? Why is SI added to steel?

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