OBJECTIVES & PROTOCOL
🎯
Mission Targets
- • Identify Microstructures: Ferrite, Pearlite, Martensite.
- • Quantify cooling impact on Modulus of Rigidity (G).
- • Compare ductile flat vs brittle helical failures.
Real World Application
Driveshafts must maintain toughness yet withstand wear. Heat treatment provides the hard outer case for gears and shafts.
Master Protocol (Safety)
🔥
Extract with long tongs only. Temperature exceeds 850°C.
👓
Protective eyewear mandatory during water quenching release.
💨
Observe etchant behavior only under localized fume hood control.
Heat Treatment Quick Facts
Use these facts to improve your discussion and conclusions.
Austenitizing
Heat above critical temperature to form austenite before quenching.
Quenching
Faster cooling increases hardness (martensite), but raises cracking risk.
Tempering
Reduces brittleness after quench while keeping useful hardness.
Cooling Medium
Water is aggressive; air/furnace cooling promotes tougher, softer structures.
Mini Challenge
Try to get high score without rushing mistakes.
TargetMartensite
TipFast quench, then temper.
Your Total0 pts
Interactive Scorecard Simulations
Quench speed and phase logic impact performance points
Game 1: Quench Timing Challenge
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Induction zone
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Game 1 Pts: 0
Heat the specimen to austenite then quench quickly for maximum points.
Game 2: Microstructure Identifier
Game 2 Pts: 0
5-Picture Challenge
Progress: 0/5
Correct: 0
Login, then start the 5-picture challenge.
Tip
Martensite: needle-like lines. Pearlite: layered lamellae. Ferrite: bright equiaxed grains.
Quiz (5 Questions)
Your quiz score contributes to the leaderboard
Quiz Status
Not submitted
Quiz Pts: 0
Q1
Main purpose of tempering after quenching is to…
Q2
Fastest cooling medium (most severe quench) is usually…
Q3
Which microstructure is typically the hardest in steel?
Q4
Austenitizing means…
Q5
In general, faster cooling tends to…
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Leaderboard
Competitive ranking: total points = Game 1 + Game 2 + Quiz
Top Students
| Rank | Student | Total | G1 | G2 | Quiz |
|---|
Official self-audit rubric
| Criteria Assessment Item | Excellent (9-10) | Good (7-8) | Satisfactory (5-6) | Poor (3-4) | Very Poor (0-2) |
|---|---|---|---|---|---|
| 1. Appearance & Organization | Perfect sequence, formatted clean, manual neat slips correction, computer cover bound, single PDF. | Format good missing one minor cover information detail. readable. | rough format organization uneven readable multiple mistakes spelling. stapled no bind. | Sloppy formatting out of ordertorn inserts language errors staples poor. | Most poor conditions met or absent report submission. |
| 2. Theory & Information | All objectives rephrased own sentences, detailed paragraph linking torsion theory coursework, external source research integration. | Objectives clear prior knowledge present phrasing manual attempt minor phrasing. | Loose statements objectives identified somewhat reliance text manual original phrasing limit. | theory copy verbatim Objectives unclear or missing minimal relevant offered content. | Theory content absent. |
| 3. Apparatus & Procedure | All materials listed labeled diagrams machine setup steps own words safety photo included. | Vital items included omission maybe 1, paraphrased manual procedure attached report lacking photo. | Partial list omissions key missing difficult follow steps copied unclear unnumbered. | Equipment absent procedure unusable confusing diagrams missing. | Content absent. |
| 4. Results & Calculations (x2) | Accurate data trends easy see organized correctly Tables numbered captioned. calc walkthrough samples formula MS equations. | Correct trends less obvious table labels units equation formulas use few misses. | Some data missing sloppy tables titles units missed no calc walk. | Poor construction figures poor number Titles captions absent incorrect reliable bad data. | Results absent. |
| 5. Discussion (x2) | Answer allAccurately links Outcomes theory trends interpreted correct discussed error reduce ways. | miss one answer minor improvements trends notes errors correctly clearly. | miss 2 partial understanding inconsistencies depth shallow error mention. | Indicator lack understanding Incorrect comparison interpretation Objective theoriy missing error discuss absent. | Absent. |
| 6. Conclusions | Summarizes essential data conclusion achieve Objectives VALID VALIDITY experiment improvements learned logic. | missing 1 excellent element. | missing 2 elements. | missing 3+ elements. | no conclusions. |
| 7. References | >9 multiple source standard manual format written. 30% references < 5 years. | 6 - 8 sources multiple media written format. | 3 - 5 source 2 media format partial compliance. | 1 - 2 cited sources formats manual ignore. | No references. |
Attendance: Absent Student = 0% marks
Report Not Submitted = 10% maximum score
Laboratory Scorecard hub
Capture your metallographic observations and conclusions here. Generate a validated professional submission PDF sheet with university branding.
Camera Evidence (Optional)
Snap a photo (specimen / apparatus) and include it in your PDF submission.
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Authenticated Mark
0
Total Points (G1+G2+Quiz)
Breakdown
G1
0
G2
0
Quiz
0