Which outcome occurs when quenched steel undergoes temper embrittlement during a tempering process?

💡 Explanation

When quenched steel is heated during tempering, temper embrittlement occurs because elements like phosphorus segregate to grain boundaries, weakening them, leading to reduced impact toughness. Therefore, grain boundary segregation occurs, rather than increased austenite, martensite widening, or increased ductility, which involve different phase transformations.

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