The influence of Zn on the mechanical property of Al-Zn alloy
碩士 === 國立中山大學 === 材料與光電科學學系研究所 === 100 === In this study, mechanical properties of Al-Zn alloys were conducted, with various parameters including Zn contents, grain size, and tensile strain rate. Experimental samples were all manufactured with friction stir processing method. Samples of Al-Zn al...
Main Authors: | , |
---|---|
Other Authors: | |
Format: | Others |
Language: | zh-TW |
Published: |
2012
|
Online Access: | http://ndltd.ncl.edu.tw/handle/77109075740480081130 |
id |
ndltd-TW-100NSYS5124014 |
---|---|
record_format |
oai_dc |
spelling |
ndltd-TW-100NSYS51240142015-10-13T21:17:53Z http://ndltd.ncl.edu.tw/handle/77109075740480081130 The influence of Zn on the mechanical property of Al-Zn alloy 鋅元素對鋁鋅合金的機械性質之影響 Hong-Kun Yan 顏宏坤 碩士 國立中山大學 材料與光電科學學系研究所 100 In this study, mechanical properties of Al-Zn alloys were conducted, with various parameters including Zn contents, grain size, and tensile strain rate. Experimental samples were all manufactured with friction stir processing method. Samples of Al-Zn alloys with the grain size of 1.5μm, 1μm, or 0.5μm and five Zn concentration were pulled in tension at strain rate of 10-3s-1,10-4s-1 and 10-5s-1 . The data set were then used to draw engineering and true tensile stress vs. strain curves , flowing stress vs. Zn contents curves, Hall-Petch equation curves, m vs. Zn contents curves and m vs. grain size curves. Quantitative analysis were conducted to discover that solid solute softening and inverse Hall-Petch relation were present in Al-Zn alloys, which were more prominent at slower tensile strain rate when grain size was less than 1μm and the Zn contents was higher than 10wt%. Quantitative analysis of strain rate sensitivity (m) showed the trends of increasing value of m with higher Zn contents and smaller grain sizes when solid solute softening and inverse Hall-Petch relation were present. The high grain-boundary diffusion coefficient of Zn which accelerates the efficiency of dynamic recovery are considered the main reason. The effect gets more prominent with increasing Zn contents , smaller grain size , and slower tensile strain rate. For Zn concentration higher than 10wt%, dynamic recovery may drive inverse Hall-Petch relation to appear when grain size is about 1μm large. none 何扭今 2012 學位論文 ; thesis 110 zh-TW |
collection |
NDLTD |
language |
zh-TW |
format |
Others
|
sources |
NDLTD |
description |
碩士 === 國立中山大學 === 材料與光電科學學系研究所 === 100 === In this study, mechanical properties of Al-Zn alloys were conducted, with various parameters including Zn contents, grain size, and tensile strain rate. Experimental samples were all manufactured with friction stir processing method. Samples of Al-Zn alloys with the grain size of 1.5μm, 1μm, or 0.5μm and five Zn concentration were pulled in tension at strain rate of 10-3s-1,10-4s-1 and 10-5s-1 .
The data set were then used to draw engineering and true tensile stress vs. strain curves , flowing stress vs. Zn contents curves, Hall-Petch equation curves, m vs. Zn contents curves and m vs. grain size curves. Quantitative analysis were conducted to discover that solid solute softening and inverse Hall-Petch relation were present in Al-Zn alloys, which were more prominent at slower tensile strain rate when grain size was less than 1μm and the Zn contents was higher than 10wt%.
Quantitative analysis of strain rate sensitivity (m) showed the trends of increasing value of m with higher Zn contents and smaller grain sizes when solid solute softening and inverse Hall-Petch relation were present. The high grain-boundary diffusion coefficient of Zn which accelerates the efficiency of dynamic recovery are considered the main reason. The effect gets more prominent with increasing Zn contents , smaller grain size , and slower tensile strain rate. For Zn concentration higher than 10wt%, dynamic recovery may drive inverse Hall-Petch relation to appear when grain size is about 1μm large.
|
author2 |
none |
author_facet |
none Hong-Kun Yan 顏宏坤 |
author |
Hong-Kun Yan 顏宏坤 |
spellingShingle |
Hong-Kun Yan 顏宏坤 The influence of Zn on the mechanical property of Al-Zn alloy |
author_sort |
Hong-Kun Yan |
title |
The influence of Zn on the mechanical property of Al-Zn alloy |
title_short |
The influence of Zn on the mechanical property of Al-Zn alloy |
title_full |
The influence of Zn on the mechanical property of Al-Zn alloy |
title_fullStr |
The influence of Zn on the mechanical property of Al-Zn alloy |
title_full_unstemmed |
The influence of Zn on the mechanical property of Al-Zn alloy |
title_sort |
influence of zn on the mechanical property of al-zn alloy |
publishDate |
2012 |
url |
http://ndltd.ncl.edu.tw/handle/77109075740480081130 |
work_keys_str_mv |
AT hongkunyan theinfluenceofznonthemechanicalpropertyofalznalloy AT yánhóngkūn theinfluenceofznonthemechanicalpropertyofalznalloy AT hongkunyan xīnyuánsùduìlǚxīnhéjīndejīxièxìngzhìzhīyǐngxiǎng AT yánhóngkūn xīnyuánsùduìlǚxīnhéjīndejīxièxìngzhìzhīyǐngxiǎng AT hongkunyan influenceofznonthemechanicalpropertyofalznalloy AT yánhóngkūn influenceofznonthemechanicalpropertyofalznalloy |
_version_ |
1718060286538153984 |