3 Induction hardening and flame hardening are two heat treatment methods that can be used to increase wear resistance of a material's surface while keeping the inner core tough. Which of the following is true? (A) Induction hardening uses an electric current. (B) Flame hardening requires a longer quench time. (C) Induction hardening has a lower operating temperature. (D) Flame hardening results in smaller grains in its structure. s goingies (A) emsed gniliste (8) (0) gmidors 2 (0) neig gavos oz agniwth ovitosges

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Temperature effects on atom arrangements

Atoms are the smallest units of matter. Atoms can be subdivided into electrons, protons, and several other subatomic particles. Groups or combinations of atoms form molecules that primarily decide the property and behavior of materials. These molecules have the property to attract other molecules based on the valence electrons in the atoms' outermost orbit. An orderly arrangement of molecules is known as crystal structure, which forms the fundamental topic of concern in materials science and engineering. The arrangement of molecules is different for different materials and hence, each material exhibits different lattice arrangements. The lattice arrangements are functions of external loads, deformations, and temperature. On experiencing high temperatures or low temperatures, the behavior of the lattice arrangement of a material change.