leomet 发表于 2015-10-29 19:35:17

ustbzt 发表于 2015-10-24 19:07
精美，又欣赏到leomet老师的精彩作品了

Good for you !.............

cmc01253 发表于 2015-10-30 15:03:45

Hello, Mr. Wu, matrix which is close to twin boundary is always short of carbide particles, can i say that it was twin boundary carbide the cause the shortage of carbide particles?

leomet 发表于 2015-10-30 17:29:21

本帖最后由 leomet 于 2015-11-3 08:51 编辑

Yes, you are right. Carbon atoms gather at twin boundary to form carbide, so there is always a carbide-free zone/band (PFZ) beside twin carbide, and boundary carbide as well.

leomet 发表于 2015-10-30 19:48:32

本帖最后由 leomet 于 2016-8-13 15:12 编辑

該試樣繼續浸蝕下去, 基地腐蝕更深, 碳化物突出更高, 對焦效果就不好了.

Note that the twin carbide platessticking out of the matrix more.

They act as blade and cut open the matrix of the steel.

leomet 发表于 2015-11-2 20:36:33

Twin boundary carbide

本帖最后由 leomet 于 2015-11-3 08:54 编辑

今天又照了些彩蝕的........................

ui821 发表于 2015-11-6 11:23:49

What the wonderful photomicrograph!
It's the first time for me to view the twin carbide.
Thanks, Mr. Wu:D

leomet 发表于 2015-11-15 13:59:05

ui821 发表于 2015-11-6 11:23
What the wonderful photomicrograph!
It's the first time for me to view the twin carbide.
Thanks, M ...

It took me 30+ years to see this for the 2nd time.

pangxingt 发表于 2015-11-16 09:50:55

非常精彩，感谢分享。

ddx 发表于 2015-12-6 22:23:08

第一次看到，太好了！

zqrlp 发表于 2015-12-8 16:47:45

老师就是老师，学习了，谢谢！请问是氧化法制作的吗？

xw550823189 发表于 2015-12-9 18:06:10

老師好，

你的資料是真實的么？

你是台灣大學畢業的？在哪裡任職？


大師級人物，可否認識一下？

leomet 发表于 2015-12-9 21:11:58

本帖最后由 leomet 于 2016-7-29 22:23 编辑

xw550823189 发表于 2015-12-9 18:06
老師好，

你的資料是真實的么？


Yeah, they are real.

To know more about me:

http://leometwu.pixnet.net/blog/post/13736857

台灣網站你需先學會 翻牆.

xw550823189 发表于 2015-12-9 21:57:34

leomet 发表于 2015-12-9 21:11
Yeah, they are real.

To know more about me:


Thank you！

Nice to meet you！

xw550823189 发表于 2015-12-9 22:03:30

leomet 发表于 2015-12-9 21:11
Yeah, they are real.

To know more about me:


sorry，I cannot visit your blog！

xw550823189 发表于 2015-12-10 09:15:30

leomet 发表于 2015-12-9 21:11
Yeah, they are real.

To know more about me:


sorry，I cannot visit your blog

Maybe the server is not located in China Mainland.

As you know nearly allthe overseas server ,such as Hongkong，Macau，Taiwan area，or some other foreign countries，is forbidden here.

清茶 发表于 2015-12-18 16:46:18

佩服佩服,材料界英语最好的,英语界材料分析最好的:victory:

leomet 发表于 2015-12-19 18:09:13

清茶 发表于 2015-12-18 16:46
佩服佩服,材料界英语最好的,英语界材料分析最好的

They say flatters will get you anywhere. Remember this.

leomet 发表于 2016-6-12 16:17:03

xw550823189 发表于 2015-12-10 09:15
sorry，I cannot visit your blog

Maybe the server is not located in China Mainland.


聽過 "跨牆"軟件???????????????

leomet 发表于 2016-7-29 22:27:18

X46Cr13 tooling failed

本帖最后由 leomet 于 2018-2-17 21:16 编辑

X46Cr13   fatigue fracture surface....................

Tooling failed in a fewweeks. So, customer sent it back for complaint.

leomet 发表于 2016-7-29 22:33:41

本帖最后由 leomet 于 2016-9-6 19:16 编辑

Microstructureof this tooling.

Lots and lots of twin and grain boundary carbides which are
very detrimental to the toughness of any tool steel. These carbides appeared
after billet forging. But the problem originated from a poor diffusion annealing, or, soaking
of the ingot.
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