The GATE Grind

GATE 2026 MT – Question 37

Mechanical Behaviour of Materials · Dislocations and strengthening · 2 marks · Multiple choice

Match the concepts in Column I with the associated terms in Column II.

Column I:

(P) Paris law

(Q) Schmid factor

(R) Larson–Miller parameter

(S) Portevin–Le Chatelier effect

Column II:

(1) Creep

(2) Fatigue

(3) Dynamic strain aging

(4) Critical resolved shear stress

  1. P-3, Q-1, R-2, S-4
  2. P-2, Q-4, R-1, S-3
  3. P-2, Q-4, R-3, S-1
  4. P-1, Q-3, R-2, S-4

Practise this question in The GATE Grind →

Show answer and explanation

Correct answer: (B) P-2, Q-4, R-1, S-3

Explanation

Paris law gives fatigue crack-growth rate (2). Schmid factor resolves applied stress into shear on a slip system, linking to CRSS (4). Larson–Miller parameter combines temperature and rupture time in creep (1). Portevin–Le Chatelier serrations arise from dynamic strain aging (3). Thus **P2,Q4,R1,S3, B**.