Chip morphology — continuous chip description Continuous chips produced during ductile cutting are often described as long coils with nearly uniform thickness along their length. Is this description accurate?

Introduction / Context:
Chip type is a quick indicator of cutting mechanics and surface quality. Continuous chips typically arise when machining ductile materials at suitable speeds with sharp tools and adequate rake, often leading to good finish but chip disposal challenges.

Given Data / Assumptions:

• Ductile work material (e.g., mild steel, aluminum).
• Sharp tool, positive rake, appropriate speed and feed.
• No significant built-up edge formation.

Concept / Approach:
Continuous chips form by plastic flow along a stable shear plane, producing a ribbon-like chip. Without chip breakers, the chip rolls into long coils or snarls. Thickness along the ribbon is approximately uniform because the shear conditions and undeformed chip thickness remain consistent during steady cutting.

Step-by-Step Solution:
Relate continuous chip to ductile flow and stable shear plane.Note that steady feed generates nearly constant undeformed chip thickness.Infer that the produced chip maintains near-uniform thickness, appearing as long coils.

Verification / Alternative check:
Shop observations show continuous helical chips on turning operations of ductile metals. Chip breakers are introduced to avoid safety hazards and tool damage due to long coils.

Why Other Options Are Wrong:
Brittle materials tend to form discontinuous or segmented chips; cast irons usually break into small segments due to graphite flakes; rake angle variations influence chip curl but not the fundamental definition.

Common Pitfalls:
Assuming absolutely constant thickness; in reality, minor variations occur, but the description ‘‘long coils with the same thickness’’ is an accepted practical characterization.

Final Answer:
Agree