Rank the following iron-carbon alloys and associated microstructures from the hardest to the softest: __________. (a) 0.25 wt% C with

Question

Rank the following iron-carbon alloys and associated microstructures from the hardest to the softest: __________.
(a) 0.25 wt% C with coarse pearlite,
(b) 0.80 wt% C with spheroidite,
(c) 0 25 wt% C with spheroidite, and
(d) 0.80 wt% C with fine pearlite.
Justify this ranking.

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Orla Orla 3 years 2021-08-07T08:19:11+00:00 1 Answers 459 views 0

Answers ( )

  1. Eirian
    0
    2021-08-07T08:21:08+00:00
    Reply

    Answer:

    The Ranking from

    Hardest to softest is as follows :

    0.80 wt% C with fine pearlite.

    0.80 wt% C with spheroidite

    0.25 wt% C with coarse pearlite

    0.25 wt% C with spheroidite

    Explanation:

    To find – Rank the following iron-carbon alloys and associated microstructures from the hardest to the softest. Justify this ranking.

    Solution –

    Ranking is as follows :

    (d) 0.80 wt% C with fine pearlite.

    (b) 0.80 wt% C with spheroidite

    (a) 0.25 wt% C with coarse pearlite

    (c) 0 25 wt% C with spheroidite

    Justification –

    For some wt% C,

    Fine pearlite is stronger than spheroidite

    and

    Coarse pearlite is stronger than spheroidite.

    Now,

    Due to carbon content,

    0.80 wt% C with spheroidite is stronger than 0.25 wt% C with coarse pearlite.

    So,

    The Ranking from

    Hardest to softest is as follows :

    0.80 wt% C with fine pearlite.

    0.80 wt% C with spheroidite

    0.25 wt% C with coarse pearlite

    0.25 wt% C with spheroidite

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