The mechanical properties of plasma arc welded Zirconium alloy R60702

碩士 === 國立臺灣師範大學 === 機電科技研究所 === 97 === The purpose of this study is to investigate the plasma arc welding properties of the zircaloy R60702 thin 2mm by using the tensile test(including force, elongation, engineering stress and engineering strain), the micro-hardness, the optical microscopy(base met...

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Main Authors: CHEN KUAN-CHIH, 陳冠至
Other Authors: 鄭慶民
Format: Others
Language:zh-TW
Published: 2009
Online Access:http://ndltd.ncl.edu.tw/handle/77106658248108932653
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spelling ndltd-TW-097NTNU56570032015-10-13T12:04:57Z http://ndltd.ncl.edu.tw/handle/77106658248108932653 The mechanical properties of plasma arc welded Zirconium alloy R60702 鋯合金R60702電漿銲件機械性質之研究 CHEN KUAN-CHIH 陳冠至 碩士 國立臺灣師範大學 機電科技研究所 97 The purpose of this study is to investigate the plasma arc welding properties of the zircaloy R60702 thin 2mm by using the tensile test(including force, elongation, engineering stress and engineering strain), the micro-hardness, the optical microscopy(base metal, hot affect zone and fusion zone)and scanning electron microscopy(ductile or brittle fracture). Based on the experimental results, all of the tensile specimens ruptured in the base metal. Bonding strength of fusion zone was higher than that of base metal. In addition, the tensile strength, yield strength, elongation and hardness of the zircaloy R60702 sheet before welding was 497.95 MPa, 322.10 MPa, 38.40%, Hv161, respectively. After welding, the tensile strength and elongation of weld were 484.22 MPa and 24.40%, respectively. The tensile strength of the welding region was about 90% of the base metal. Thus, the yielding strength will be higher than base metal, while the percentage elongation will be lower than base metal. From the microstructure observation, the surface of fusion zone was all columnar dendritic. The center of fusion zone tends to basket weave. The fracture surface of tensile test specimens has the feature of dimple. 鄭慶民 2009 學位論文 ; thesis 69 zh-TW
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language zh-TW
format Others
sources NDLTD
description 碩士 === 國立臺灣師範大學 === 機電科技研究所 === 97 === The purpose of this study is to investigate the plasma arc welding properties of the zircaloy R60702 thin 2mm by using the tensile test(including force, elongation, engineering stress and engineering strain), the micro-hardness, the optical microscopy(base metal, hot affect zone and fusion zone)and scanning electron microscopy(ductile or brittle fracture). Based on the experimental results, all of the tensile specimens ruptured in the base metal. Bonding strength of fusion zone was higher than that of base metal. In addition, the tensile strength, yield strength, elongation and hardness of the zircaloy R60702 sheet before welding was 497.95 MPa, 322.10 MPa, 38.40%, Hv161, respectively. After welding, the tensile strength and elongation of weld were 484.22 MPa and 24.40%, respectively. The tensile strength of the welding region was about 90% of the base metal. Thus, the yielding strength will be higher than base metal, while the percentage elongation will be lower than base metal. From the microstructure observation, the surface of fusion zone was all columnar dendritic. The center of fusion zone tends to basket weave. The fracture surface of tensile test specimens has the feature of dimple.
author2 鄭慶民
author_facet 鄭慶民
CHEN KUAN-CHIH
陳冠至
author CHEN KUAN-CHIH
陳冠至
spellingShingle CHEN KUAN-CHIH
陳冠至
The mechanical properties of plasma arc welded Zirconium alloy R60702
author_sort CHEN KUAN-CHIH
title The mechanical properties of plasma arc welded Zirconium alloy R60702
title_short The mechanical properties of plasma arc welded Zirconium alloy R60702
title_full The mechanical properties of plasma arc welded Zirconium alloy R60702
title_fullStr The mechanical properties of plasma arc welded Zirconium alloy R60702
title_full_unstemmed The mechanical properties of plasma arc welded Zirconium alloy R60702
title_sort mechanical properties of plasma arc welded zirconium alloy r60702
publishDate 2009
url http://ndltd.ncl.edu.tw/handle/77106658248108932653
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