When a metal is undergoing heat treatment,...

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Question 1 of 205eccef9cbacbc34ba4d45bcd

When a metal is undergoing heat treatment, what happens when the metal is heated above its critical temperature?

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5eccef9cbacbc34ba4d45bcd

When a metal is undergoing heat treatment, what happens when the metal is heated above its critical temperature?

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🔍 Key Concepts

• Heat treatment critical temperature in metals • Difference between phase change (solid/liquid/gas) and internal crystal structure changes • What happens to steel when it is heated for hardening or annealing

💭 Think About

• Ask yourself: in normal heat treatment of steel parts (like for hardening), do we normally melt the steel, or keep it solid while changing its properties? • Which of the options describes a change you’d see on a phase diagram of water (ice–water–steam), and which describes something happening inside the solid metal? • Think about why heating to a specific ‘critical’ temperature is important before quenching—what has to change inside the metal first?

✅ Before You Answer

• Identify which choices describe phase changes between solid, liquid, and gas and which choice refers to internal lattice/crystalline changes within a solid. • Remember that in common industrial heat treatments the metal part must remain solid, not melted or vaporized. • Connect the idea of critical temperature with the temperature at which the metal’s internal structure transforms while staying in the same physical state.

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Question 1 of 205eccef9cbacbc34ba4d45bcd

When a metal is undergoing heat treatment, what happens when the metal is heated above its critical temperature?

Back

Question 1 of 20

5eccef9cbacbc34ba4d45bcd

When a metal is undergoing heat treatment, what happens when the metal is heated above its critical temperature?

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

💭 Think About

✅ Before You Answer

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

Quick actions

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