Question
The Jominy (“JAH-min-ee”) end-quench test measures how much this property can be increased. This property is locally increased by precipitating nitrides at a metal’s surface. The strain-induced increase in this property is balanced by a loss of cross-sectional area when a material first necks. A martensitic transformation boosts this property by hundreds of Brinell. Work increases this property by rearranging a metal’s dislocations. (*) Annealing decreases this property and increases ductility. Alloying iron to steel doubles this property, as estimated by the yield stress in an indentation test. Scratch tests compare this property to minerals like quartz and talc. For 10 points, name this property measured on the Mohs scale. ■END■
ANSWER: hardness [or hardenability; accept hard; accept yield stress or tensile strength or tensile stress until “yield stress” is read; prompt on strength or toughness; prompt on Young’s modulus or shear modulus or bulk modulus or modulus or stiffness]
<Adam Silverman, Science - Chemistry> ~27614~ <Editor: Adam Silverman>
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Summary
| Tournament | Edition | Exact Match? | TUH | Conv. % | Power % | Neg % | Average Buzz |
|---|---|---|---|---|---|---|---|
| 2024 PACE NSC | 06/08/2024 | Y | 36 | 100% | 8% | 0% | 93.03 |