1) Give a brief explanation why the hardness of hardend steel will decrease with tempering

Figure shows a diagram from an impact strength test of metals that have three different crystal structures.a) What type of crystal structures do the curves (I), (II) and (III) represent? b) why won't the metals in curve (I) have a marked transition temperature?

a). Explain the two types of annealing process in the heat treatment of metals. b). Explain the stages in a heat treatment process.

You've got some spare 1050 steel that you decide to use to make a hand tool using your friend's forge. You've pulled the T-T-T diagram below from literature. (F, P, B, M represent ferrite, pearlite, bainite, and martensite respectively, where subscript "s" indicates the start of a transformation and subscript "f" indicates the finish): a) What is the nominal carbon content in the steel? b) What temperature must be reached to completely austenitize the material? c) What is the proeutectoid phase? d) If you cool to 625°C and hold for 1000s, how much proeutectoid phase would be present (ignoring any impurities other than carbon)? e) Cutting tools are often hardened via rapid quenching, then tempered to give the desired balance of hardness and toughness. Sketch and describe the resulting microstructure (include labels for all the microconstituents), and illustrate the heat treatment on the T-T-T diagram. Temperature (°C) 900 800- A3 700 A₁ 600 500 400 200 M₁ 300 My 100 T 0 Y 0.1 F₁ B₁ 1 P₁…

Need help on this Q

Can someone solve this for me URGENT!!!

O Which alloy type would you recommend for a dental implant? a) Aluminum alloy b) Magnesium alloy c) Copper alloy d) Titanium alloy e) Nickel alloy

The properties of a titanium allow used in commercial airplanes are shown in the table: Strength (MPa) Grain Size (mm) 0.020 162 0.055 148 Determine a) the constants of the Hall-Petch equation and b) the grain size required to obtain a strength of 192 MPa

Iron carbon phase diagram extends up to 6.7% carbon only, why? (Mention two reasons)Single line text.

What is the appropriate proportion of aluminum in the bronze alloy to make this alloy hardenable by the quenching process? Option 1 Q 2) What is the purpose of this process for Softening Annealing?