Sorry if this isn't the place to ask, but I am just starting out in this field doing some literature review and all the Ti-64 microstructure descriptions have been extremely confusing. Also I am a solid mechanics person by trade, not a materials engineer so that makes it just a little harder.
I know there are equiaxed and bimodal textures in Ti-6Al-4V, and there are Widmanstatten/lamellar Ξ± etc. But then I come across terms like primary and secondary Ξ±, and then (somewhat) subjective descriptions like "plates" vs "platelets" vs "globules" are used everywhere. Terms like martensitic Ξ±' and Ξ±'' and Ξ±2 and prior Ξ² really just confuse me even more.
The heating/cooling/deformation cycle isn't so much of an issue. My main problem is that I look at the micrographs and they all look the same to me, so I really just want to know what I am looking out for.
If anyone with a background in titanium metallurgy has some spare time during this beautiful weekend, I am willing to pay you a small fee (maybe $20?) for just 30 minutes of your time if you can clear up this mess in my head. If you have Zoom or any screensharing app for me to show you what I'm looking at, that would be perfect. Thank you!
Do I need carbide or will HSS do? It's based on the hardness of the material, correct?
I have never dealt with titanium but we have a run of 50 parts to make that I will be turning, drilling, tapping, and milling flats on.
Is there anything I should know about titanium before diving into this? Does it require special inserts, drills, etc?
x-post in r/Machinists, bear with me I'm a student. I have NO experience machining Ti before this, I used some speeds and feeds I found and crunched these numbers: both are 4 flute and solid carbide, the 3/16 is coated with TiAN
| End mills | feed | RPM | IPM |
|---|---|---|---|
| 3/16 | 0.0005 | 1019 | 2.037 |
| 1/16 | 0.0003 | 4889 | 5.867 |
So I'm machining some Titanium .050" thick for a bottle opener. ITs small barely 2.4" by 1.8". But I've never worked with Titanium, and that stuff is kind of difficult from what I understand. I don't want to wast my carbide with poor feeds and speeds.
The 3/16 is doing full diameter cuts, and the 1/16 is finishing the through features. Most of the radius' are .08"-.05".
I guess what Im asking is how proper or hosed are my speeds and feeds? Ive never worked with titanium before but from what I have gleaned you want to avoid dwelling on your material so it doesn't work harden. An SFM from around 50-150 (specific to 6al-4V) but does anyone have any experience with this stuff?
TL;DR feeling lost with speeds and feeds for 6al-4v titanium
Happy Christmas time!
Selling a bunch of knice knives. I'm slowly realizing that the nicer the knife, the more I make it a safe queen, the less I get joy out of it (with the exception of nice balisongs that I can just flip instead of actually use.) So time to spread the joy.
See full album link above for multiple pics of each knife
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SOLDDDDDD
Malanika Puuko 4v - $415 Shipped - How is it possible that I had 2 Malanikas to sell, you say? Luck, patience, and overtime pay at the time. First owner. Stacked Birch Bark handle. Carried in backpack. Never cut, never sharpened. Applied Sno Seal to the handle and sheath. I've held onto this for a year and I keep thinking I would use it when out camping, but never took it out of my rucksack in favor of my less expensive users. Along the trip, the pommel rubbed against something in there and caused a bit of abrasion on the corner, I tried polished it out with an emery board buffing side (shown in pictures) it's smooth but not perfect looking. If you've never held stacked birch bark, it's a wonderful material. It feels almost warm to the touch and so soft and supple as if inviting you into bed with it. I will get another one someday, but I'm thinking in a different steel. Something that I can repair more easily if I do decide to beat it up. -
Spyderco Smallfly 2 - $170 Shipped - Second owner, never cut, never sharpened, oiled pivots with Remoil. Carried a handful of times. Flipped minorly. I bought this a month ago to test out. Spyderco doesn't disappoint with the quality they bring. The bushing/washer pivots are smooth as butter. No blade tap or handle play. This is more of an EDC bali and I really don't like to EDC my balisongs turns out. Includes box.
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SOLD ~~Spyderco Para 3, M390, Ti scales, Lynch clip, closed lanyard tube - $220 $205 $185 shipped - I call this one 'Frankenstein's Monster's Bride'. I'm at least the third owner. Disassembled to clean and lube and loctite. Micro scratches on the blade barely noticeable unless searching for it. Cut some package tape. Never sharpened. Carried occasionally. Ti Scales from Blades We Love have clip snap markings from the old Spyderco clip and as well from the lynch clip. Includes an original box, maybe not THE original box, but it does have m39
Hey guys!
I am a second year pre bio major and I have a scheduling conflict for this quarter. The recommended course load for this quarter is MCDB 1B, EEMB 2, MCDB 1LL, Chem 6AL, and Physics 6B-6BL. Next quarter I need to take EEMB 3, EEMB 2LL, Chem 109C, and Physics 6C-6CL.
I finished the Physics series and Ochem 109A-B.
What I plan to take this quarter is MCDB 1B, MCDB 1LL, and possibly Chem 6AL (the ochem lab). HOWEVER, there is a scheduling conflict where 6AL overlaps with EEMB 2. I don't want to drop EEMB because it's necessary to stay on track. But if I kept 6AL the only option would be to move it to Friday 8am and drop my yoga class and switch my bio section to a different day.
Another option would be to take it in the spring with Chem 109C and EEMB 3 + EEMB 2LL, but it is not guaranteed I can get into the lab again. I also wonder if I should take it now because there would be a break from ochem since I finished 109B during the fall..
Should I just drop 6AL and take it in the spring or over the summer? I am afraid I might not be able to get into the class. I also am wondering if I should keep it because things could be easier online? Any advice would help:)
I managed to get off the waitlist for chem 6al this quarter but the section Iβm in conflicts w/ another class. anyone willing to switch their section with mine (Thursday 8am)??
Hello can anyone please share the syllabus for these classes from the fall quarter?
I took 6AL spring 2021 and was going to wait until summer 2022 to take chem 6BL but now Iβm worried that Iβm waiting too long in between. Is this reasonable or should I try to get into 6BL for winter quarter?
What is the approximate time commitment of these courses in hours? Especially for Chem 6BL, how much work is there outside of the lab?
Is there a GroupMe for Physics 6A/6AL? I checked the spreadsheet numerous times and there was no link, so I want to double check just in case the link hadn't gotten added yet or something.
Also, if there isn't a group chat yet, can someone either comment or PM me the add code for Freund for Achieve? Unfortunately I had to miss both classes last week because of a COVID scare (tested negative thankfully), so I never got the add code, and it's not on the syllabus.
I'm a 2nd year pre-med Biopsych major and the classes I'm planning to take this winter are Chem 109B, EEMB 2, MCDB 1B/1LL, and ANTH 2. I know most say to put off Chem 6AL until summer, but I'm guessing it'll be in-person now and I'll be living 1hr30mins away. I also want to get it over with lol. Do we meet up often for labs/lectures, or would the commute be doable? If not, should I replace one of my winter courses with 6al? There's a chance I may not even be able to get MCDB 1LL bc of the new pass limits
pls im never gonna get to take this class if it always fills up this quickly
when taking physics 6AL what were the averages for the lab reports. my TA is celestial
Just got a buzz from the spydie app about this. These 4V exclusives have been held in pretty high regard, so there may be a lot of people not this. According to the site, there are about 525 of these going on sale.
I posted this in /r/materials as well before I thought of this sub. I am just starting out in this field doing some literature review and all the Ti-64 microstructure descriptions have been extremely confusing. Also I am a solid mechanics person by trade, not a materials engineer so that makes it just a little harder.
I know there are equiaxed and bimodal textures in Ti-6Al-4V, and there are Widmanstatten/lamellar and globular Ξ± etc. But then I come across terms like primary and secondary Ξ±, and then (somewhat) subjective descriptions like "plates" vs "platelets" are used everywhere. Terms like martensitic Ξ±' and Ξ±'' and Ξ±2 and prior Ξ² really just confuse me even more.
The heating/cooling/deformation cycle isn't so much of an issue. My main problem is that I look at the micrographs and they all look the same to me, so I really just want to know what I am looking out for.
If anyone with a background in titanium metallurgy has some spare time during this beautiful weekend, I am willing to pay you a small fee (maybe $20?) for just 30 minutes of your time if you can clear up this mess in my head. If you have Zoom or any screensharing app for me to show you what I'm looking at, that would be perfect. Thank you!
x-posted to r/machining, and bear with me I'm a student. I have NO experience machining Ti before this, I used some speeds and feeds I found and crunched these numbers: both are 4 flute and solid carbide, the 3/16 is coated with TiAN
| End mills | feed | RPM | IPM |
|---|---|---|---|
| 3/16 | 0.0005 | 1019 | 2.037 |
| 1/16 | 0.0003 | 4889 | 5.867 |
So I'm machining some Titanium .050" thick for a bottle opener. ITs small barely 2.4" by 1.8". But I've never worked with Titanium, and that stuff is kind of difficult from what I understand. I don't want to wast my carbide with poor feeds and speeds.
The 3/16 is doing full diameter cuts, and the 1/16 is finishing the through features. Most of the radius' are .08"-.05".
I guess what Im asking is how proper or hosed are my speeds and feeds? Ive never worked with titanium before but from what I have gleaned you want to avoid dwelling on your material so it doesn't work harden. An SFM from around 50-150 (specific to 6al-4V) but does anyone have any experience with this stuff?
TL;DR feeling lost with speeds and feeds for 6al-4v titanium
