r/metallurgy

Been working on a side project combining metallurgy + computer vision/MLOps.

The idea is basically to speed up metallographic characterization workflows using modular CV pipelines instead of fully manual inspection/reporting.

Current framework structure:

- Semantic segmentation for phase quantification in low-alloy carbon steel microstructures
- Object detection layer for cracks, macro-porosity, and coarse precipitates
- Middleware that converts feature maps into engineering metrics (area fractions, defect boundaries, etc.)
- Automated PDF inspection reporting with overlays + summarized outputs

One thing I realized quickly is that data availability is probably the biggest bottleneck in this space. Getting high-quality pixel-level annotated micrographs is extremely difficult unless you already have access to industrial archives or institutional datasets.

So instead of waiting for “perfect data,” I focused heavily on the software + deployment side first.

One interesting engineering problem was handling model evolution during deployment. I built a compatibility layer that inspects model state_dicts and remaps incompatible layer keys dynamically so experimental architecture changes don’t completely break deployment pipelines or require retraining from scratch every time.

Still very much an MVP.

The biggest challenge right now is that CV models are good at statistical feature grouping, but they obviously don’t understand thermodynamics or transformation kinetics. Things like:
- varying etchants
- magnification changes
- bainite vs tempered martensite morphology
- inconsistent polishing quality

…still create edge cases that are difficult to generalize.

Long-term, I’d like to explore physics-informed training constraints so predictions remain metallurgically consistent instead of purely visual/statistical.

The goal isn’t replacing metallurgists — more reducing repetitive feature counting and inspection reporting time.

Would genuinely love feedback from:
- people working in computational metallurgy
- QA/steel manufacturing
- physics-informed ML
- anyone who has worked with micrograph datasets

Also curious if anyone here has seen similar work being used successfully in industry already.

https://www.linkedin.com/posts/abdullah-mumtaz-5646a01a1\_materialsscience-fau-metal-activity-7462870164716572672-Kd3y?utm\_source=share&utm\_medium=member\_ios&rcm=ACoAAC9EBRwBlRsTT0ci0tdve1OpQstMQDIsPGQ

I can't get into details, but does anyone have a link to detailed information regarding the inductance of steels and hardness?

I'm writing a D&D campaign and am designing a central metal element that makes up everything (a lot of things), like Vibranium from Black Panther or something akin.

I know and understand all the regular stuff that's taught in school, what properties metals generally have as an element as well as the variety of different properties such as hardness v.s. toughness, ductility v.s. malleability etc, but I pretty much have the most basic understanding of all of it, everything you can get off a search engine. I am aware of contradictory properties (bendy metal good for wires, un-bendy metal good for manhole covers), but I would like to know what would be the "most useful" properties for a metal that could be applied to basically all of the roles metals would usually be found.

Is that possible, or would certain applications be too different for the same metal to be used in both applications? I'm talking everything from the most durable drills to the sharpest knives to the most protective helmets. It doesn't have to be something that could feasibly exist irl, I just want numbers that would make the material very good. If it does use real elements and you want to map out the structure it could have/how it would form, even better but no pressure, this is a worldbuilding experiment. Feel free to use any words and numbers in your response, I'll look up what they mean if I don't understand! I know the mohs hardness scale better than the others because I'm kinda into gems, I know what density is, I have since learned how to measure tensile strength. Thus far, I have learned many properties and potential issues from my initial search before this post (machinability, weldability, thermal diffusivity, sparking, galling, toxicity etc etc).

Alternatively, does this already exist? From what I can tell it probably can't exist, but there are a lot of very good alloys that are resistant to corrosion, extremely durable etc, which one would you pick if humanity could only use one type of metal/alloy forever? What properties would we sacrifice with your pick? If it is a steel alloy (because those are common and useful), what kind specifically and why?

So, I'm applying for this scholarship and it requires an essay on how I will help the community. Though not explicitly stated, it was implied that how will I do that with my degree. I'll be studying Metallurgical Engineering in the Philippines, and only three univs offer it here, so it's really underrated and less than 100 examinees take the licensure examinations each year. Please help me out, I badly need the scholarship.

PS: I do plan on giving back to my community some time after once I'm stable enough through charity works and involving myself with organizations. However, those are generic answers and are pretty far from my field so I would like to know more about it!

Hello everyone,

I am a 3rd-year B.Tech student in Metallurgy & Materials Engineering with a CGPA of 7.86. I had applied for internship opportunities at Rashtriya Ispat Nigam Limited (RINL), but unfortunately I did not receive any confirmation mail, and now I am struggling to find a summer internship urgently.

I have vocational training experience at SAIL Bokaro Steel Plant and reaserch experience in IIT Dhanbad in pelletization, CCS testing, and materials-related work.

I am looking for any internship/training opportunity in:

Steel industry

Metallurgy

Materials engineering

Manufacturing/process industry

If anyone has referrals, contacts, suggestions, or opportunities, please help me.

Thank you.

We are trying to identify some old pipe as either Alloy 20 (Carpenter 20) or 316 stainless. Other than xray fluorescence, is there a practical way to test the metal?

We have a chemistry lab on site so access to common acids for testing isn’t a problem.

Thanks

This might be a dumb question but I’ve been watching a ton of scrap metal shredder videos lately and now I’m weirdly curious about what kind of metal those machines are built from. Some of those shredders are chewing through engine blocks, appliances, steel drums, and random chunks of metal all day without instantly destroying themselves. I know they obviously aren’t made from regular mild steel because the blades and chambers would wear out insanely quick. I started reading about hardened steel, tool steel, manganese alloys, and abrasion resistant plate, but now every article sounds like it’s speaking another language entirely. What really confused me is how different manufacturers describe their materials. One shredder says “forged alloy blades,” another says “high chromium steel,” and another mentions heat treated cutters without explaining much else. I even found industrial catalogs from online equipment suppliers comparing shredder blade compositions and somehow every company claims theirs lasts longer than everyone else’s. For people who understand metallurgy better than I do, what metals or alloys are commonly used in scrap metal shredders and why are they chosen over standard steel?

Genuinely curious from people working in steel and metals procurement right now.

What’s been the most annoying part of it lately?

Price swings? Late deliveries????...

Just feels like there’s always something going wrong in the chain, wondering what others are actually dealing with day to day.

1st year mech. Studying the phase diagram just isnt sticking. I understand it upon observation but recalling it is just a mess. I find it abstract and all over the place so its hard to retain. Are there any successful strategies/resources people have used when learning the topic that made it a bit more intuitive or is just going be through brute force?

Hi everyone! I’m an author writing a modern day paranormal fantasy series, and I have a question about mixing metal with plant material.

I have a character using a shotgun with birdshot, which I understand is typically made with lead pellets. For the sake of my fictional story, I somehow wanted the pellets to be melted down and mixed with dried plant material or some sort of liquid tincture (in the story it is for a magical purpose). Then I’d want that combined substance to be reformed as pellets to be put into the birdshot. This would create a type of magical ammunition.

From my research it sounds like it’s very difficult to mix lead with any material besides other metals to create alloys. So I was thinking perhaps it could be another type of metal, such as silver? If not silver, are there any metal types that might work for this scenario, or should I consider an alternative idea? I want it to sound plausible, even if not completely possible. Thanks!

I am working on a small constructtion project and I was wondering if 316 grade stainless steel pipes is the standard that I should be looking for when wanting to purchase pipes? From what I know 316 stainless steel has added molybdenum which helps to resist corrosion and rust much better, especially in moist and humid enviornments. But my pipes will not be used for water or plumbing but for a factory conveyer system.

I am wondering if I need to source these quality of pipes for a project that I am working on even if I don't live in a humid climate. It does rain but its not humid or moist so I am a little confuses. When I go online on sites like alibaba or amazon business there are a lot of different qualtiies of pipes but a lot of them are labelled at 316 grade stainless steel pipes.