Home » Mechanical Engineering » Engineering Materials

Alloying effect: influence of tungsten (W) on the critical temperature of steel How does adding tungsten to steel affect the critical transformation temperature? Choose the correct trend.

Difficulty: Easy

Increases the critical temperature
Decreases the critical temperature
No significant change
First decreases, then increases

Correct Answer: Increases the critical temperature

Explanation:

Concept
Carbide-forming alloying elements such as tungsten (W), molybdenum (Mo), and vanadium (V) generally raise the critical transformation temperature(s) of steel, stabilizing ferrite/carbides and improving hot-hardness.

Final Answer
Increases the critical temperature

← Previous Question Next Question→

More Questions from Engineering Materials

Mechanical property definition: fracture with little permanent distortion Identify the material property corresponding to failure with small plastic deformation before fracture. Choose the correct option.
Effect of free carbon (graphite) in iron: hardness and structure Free (graphitic) carbon present in iron affects mechanical character and appearance. Choose the most appropriate description.
Thermoplastic materials: identify the correct definition and behavior under heat and pressure Consider the behavior of thermoplastic polymers during heating, forming, cooling, and any associated chemical change. Choose the most accurate description of thermoplastics.
Nonferrous alloys: alloy with a fine gold colour used for imitation jewellery Among the given copper-based and bearing alloys, identify the one known for a gold-like colour and typical use in imitation jewellery. Choose the correct alloy.
Austenitic stainless steels: method to increase hardness and tensile strength For 18-8 (austenitic) stainless steels, which treatment/process effectively raises hardness and tensile strength? Select the best option.
Crystallography: statements about unit cells Evaluate standard statements about unit cells (crystal lattices) and choose the most comprehensive correct option. Which is correct?
Allotropy (polymorphism): definition based on crystal structure changes with temperature Identify the correct statement describing an allotropic material. Choose the correct description.
Material property: definition of hardness (ability to resist indentation/scratch) Select the option that correctly captures the essence of hardness as a mechanical property. Choose the correct statement.
Steelmaking at TISCO (Jamshedpur): traditional primary process used historically Identify which steelmaking process has historically been in operation at Tata Iron and Steel Works (Jamshedpur) as per traditional references. Choose the correct process.
Blast furnace charging: location through which the charge is fed In an iron-making blast furnace, identify the correct region/part through which the solid charge (ore, coke, flux) is fed into the furnace. Choose the correct part.

Discussion & Comments

No comments yet. Be the first to comment!

Join Discussion