下載/瀏覽Download
Download
Report
Transcript 下載/瀏覽Download
Dispersion-strengthening effect of Cubased Mn, Al,and Zn rich alloys
授課教授:戴子堯
學
生:許晉維
學
號:MA0R0202
Powerpoint Templates
班
級:碩奈米一甲
Page 1
Introduction
銅 25.91Mn ( wt % ) , 銅 26.62Mn - 8.99Al
(wt%),銅22.17Mn - 12.32Zn鑄錠合金(wt
%)。樣品勻質固定在一個很高的溫度在不同時
期和不同的冷卻速率冷卻 。再使用掃描電子顯
微鏡SEM和EDS觀察樣品元素的重量比。
熱處理用不同條件下對
銅,錳,
銅,錳,鋁,
銅,錳,鋅
鑄錠合金進行了討論。
Powerpoint Templates
Page 2
Experimental
Cu-based alloys which are Cu–25.91Mn, Cu–26.62Mn–8.99Al, Cu–
22.17Mn–12.32Zn in weight percentages were prepared by melting the
elements (99.99%) and quenching as cylindrical rods with 1 cm
diameter and 10 cm length.From each ingot alloy, sample slices in 1mm
t h i c k n e s s h a v e b e e n o b t a i n e d b y u s i n g d i a m o n d s a w.
The surfaces were first mechanically polished, and afterwards the
damaged surface layer was eliminated by etching in Fe(NO3)3 (5g)+HCl
(25 ml)+distilled water (70 ml solution for 20 s.
Powerpoint Templates
Page 3
(a)Cu–25.912Mn (wt.%) alloy;
(b) Cu–26.624Mn–8.986Al (wt.%) alloy;
(c)Cu–22.165Mn–12.316Zn
(wt.%) alloy.
Powerpoint Templates
Page 4
樣品
Phase no
銅(wt%)
錳(wt%)
Homogenized 1 h at 900 ◦C and cooled in
液氮(a)
冰-水(b)
空氣(C)
1
71.280
28.720
2
55.103
44.897
3
61.242
38.758
1
76.788
23.212
2
87.373
12.627
1
76.718
23.282
32.270
32.270
差異(wt%)
Powerpoint Templates
Page 5
Homogenized 14 h at 900 ◦C and cooled in
液氮(d)
冰-水(e)
空氣(F)
1
76.972
23.028
2
76.833
23.167
1
77.462
22.538
2
77.511
22.489
1
81.211
18.789
2
81.448
18.552
3
80.638
19.362
4.615
4.615
差異(wt%)
Powerpoint Templates
Page 6
標準的熱處理冷卻速度和技術,展示的分散效果。
樣品有多個階段給這些階段中的元素有不同的重量百分比。
各相間的邊界表面原子排列是不完美的。
這些邊界干擾與位錯的滑移強化材料。
合金元素的重量百分比同質化的時間減少
Powerpoint Templates
Page 7
樣品
Phase no
銅(wt%) 錳(wt%) 鋁(wt%)
Homogenized 1 h at 900 ◦C and cooled in
液氮(a)
冰-水(b)
空氣(c)
差異(wt%)
1
54.895
34.872
10.243
2
52.403
37.541
10.056
3
53.701
37.658
8.641
1
56.891
31.156
11.953
2
58.935
28.680
12.385
3
52.956
36.701
10.343
1
67.460
22.430
10.110
2
64.805
31.196
3.999
15.057
15.228
8.386
Powerpoint Templates
Page 8
Homogenized 14 h at 900 ◦C and cooled in
液氮(d)
冰-水(e)
空氣(f)
1
68.129
24.098
7.773
2
66.817
24.295
8.888
1
67.710
24.082
8.208
2
67.287
25.232
7.481
3
69.274
23.602
7.124
1
66.551
23.572
9.877
2
67.693
23.169
9.138
3
70.968
22.490
6.542
4.417
2.742
3.335
差異(wt%)
Powerpoint Templates
Page 9
Homogenized 1 h at 900 ◦C and cooled in
Homogenized 14 h at 900 ◦C and cooled in
(a)三個晶界交點
(b)顯示分層變種的樣本中開始。
(c)顯示很多像針一樣,從而提高合金的強度較大數額的析出顆粒。
在這種情況下,合金得到有效的散佈強化 。
Powerpoint Templates
Page 10
樣品
Phase no
銅(wt%) 錳(wt%) 鋅(wt%)
Homogenized 1 h at 850 ◦C and cooled in
液氮(a)
冰-水(b)
空氣(c)
差異(wt%)
1
45.723
31.664
22.613
2
50.227
30.965
18.808
1
54.914
28.040
17.046
2
47.199
36.918
15.883
3
50.616
24.135
25.249
1
71.456
19.757
8.787
25.733
17.161
16.462
Powerpoint Templates
Page 11
Homogenized 14 h at 850 ◦C and cooled in
液氮(d)
1
70.069
21.660
8.271
2
67.271
20.724
12.005
3
72.186
21.472
6.342
冰-水(e)
1
67.705
20.546
11.749
空氣(f)
1
68.340
22.804
8.856
49.15
2.258
5.663
差異(wt%)
Powerpoint Templates
Page 12
Homogenized 1 h at 850 ◦C and cooled in
Homogenized 14 h at 850 ◦C and cooled in
(e)和(f),晶界清楚地看到。較大數額的晶界,提高合金的強度
Powerpoint Templates
Page 13
(a) dendritic growth in the sample
(b) occurring phase in the dendritic cavities like whiskers.
Powerpoint Templates
Page 14
Conclusions
固態熱處理反應同質化,擴散的影響,加強效果,冷卻速度對銅25.91Mn
(wt%),相結構的Cu - 26.62Mn - 8.99Al(wt %) 22.17Mn - 12.32Zn,
銅錠合金(wt% )
所有的熱處理銅錳,銅,錳,鋁,銅,錳,鋅與不同條件的樣本有色散的影響,
但顯示,銅,錳,鋁樣品展示分散-加強效果更強烈 。
熱處理可以消除由於同質化的成分梯度,所有合金元素在高溫下的差異處理銅,
錳,銅,錳,鋁,銅,錳,鋅合金隨日益同質化的時間。它可以清楚地看到,
同質化時期重要的是要產生同質合金的階段組成。
Powerpoint Templates
Page 15
Thank you for your attention
Powerpoint Templates
Page 16