ISRO Mechanical & Aerospace 2011 - Question 38

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Precipitation hardening is applicable for

  • A. Pure aluminium
  • B. Low carbon steel
  • C. Non-metal
  • D. Aluminium - Copper alloy

Answer: D. Aluminium - Copper alloy

Explanation: Precipitation hardening (Age hardening) is the strengthening mechanism for Al-Cu alloys like Duralumin.

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