Relationship between compressive residual stress relaxation and microhardness reduction after cyclic loads on shotpeened ASTM A516 grade 70 steel
Corrosion resistance; Cyclic loads; Microhardness; Shot peening; Stress analysis; Stress relaxation; Yield stress; Compressive residual stress; Hardness values; High load; Low load; Random coverages; Relaxation; Relaxation of residual stress; Steel shot; Residual stresses
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Trans Tech Publications Ltd
2023
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my.uniten.dspace-242112023-05-29T14:57:02Z Relationship between compressive residual stress relaxation and microhardness reduction after cyclic loads on shotpeened ASTM A516 grade 70 steel Isa M.R. Zaroog O.S. Ali F.S. 57193957146 57189246634 57201480148 Corrosion resistance; Cyclic loads; Microhardness; Shot peening; Stress analysis; Stress relaxation; Yield stress; Compressive residual stress; Hardness values; High load; Low load; Random coverages; Relaxation; Relaxation of residual stress; Steel shot; Residual stresses Shot peening process is a cold performed function to enhance the mechanical properties which is widely used in many industries. This process introduces compressive residual stress which was proven to increase the fatigue life, geometry stability and corrosion resistance. However, the benefit of the residual stress is still unstable due to the relaxation during the operation. This paper will study on the trend of the relaxation of residual stress against cyclic loading as well as the change in the hardness. The material used in this study is carbon steel ASTM A516/ SA 516 Grade 70. Shot peening process with steel shots was applied to the samples to introduce compressive residual stress in the samples. Cyclic load was applied to samples after shot peening process with low load of 52Mpa (20% of Yield Strength) and high load of 208Mpa (80% of Yield Strength). The measurement of residual stress using X-Ray diffraction and hardness test was done on the samples to study the trend of the relaxation of residual stress and the change in hardness values. The result shows that more relaxation of residual stress occurs if the applied cyclic load is higher. The change of hardness trend is found non-sequenced in this study due to random coverage of shot peening. � 2018 Trans Tech Publications, Switzerland Final 2023-05-29T06:57:02Z 2023-05-29T06:57:02Z 2018 Conference Paper 10.4028/www.scientific.net/KEM.765.232 2-s2.0-85045062971 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85045062971&doi=10.4028%2fwww.scientific.net%2fKEM.765.232&partnerID=40&md5=ad4d128d5e369b6f877299336ccdf106 https://irepository.uniten.edu.my/handle/123456789/24211 765 KEM 232 236 Trans Tech Publications Ltd Scopus |
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| description |
Corrosion resistance; Cyclic loads; Microhardness; Shot peening; Stress analysis; Stress relaxation; Yield stress; Compressive residual stress; Hardness values; High load; Low load; Random coverages; Relaxation; Relaxation of residual stress; Steel shot; Residual stresses |
| author2 |
57193957146 |
| author_facet |
57193957146 Isa M.R. Zaroog O.S. Ali F.S. |
| format |
Conference Paper |
| author |
Isa M.R. Zaroog O.S. Ali F.S. |
| spellingShingle |
Isa M.R. Zaroog O.S. Ali F.S. Relationship between compressive residual stress relaxation and microhardness reduction after cyclic loads on shotpeened ASTM A516 grade 70 steel |
| author_sort |
Isa M.R. |
| title |
Relationship between compressive residual stress relaxation and microhardness reduction after cyclic loads on shotpeened ASTM A516 grade 70 steel |
| title_short |
Relationship between compressive residual stress relaxation and microhardness reduction after cyclic loads on shotpeened ASTM A516 grade 70 steel |
| title_full |
Relationship between compressive residual stress relaxation and microhardness reduction after cyclic loads on shotpeened ASTM A516 grade 70 steel |
| title_fullStr |
Relationship between compressive residual stress relaxation and microhardness reduction after cyclic loads on shotpeened ASTM A516 grade 70 steel |
| title_full_unstemmed |
Relationship between compressive residual stress relaxation and microhardness reduction after cyclic loads on shotpeened ASTM A516 grade 70 steel |
| title_sort |
relationship between compressive residual stress relaxation and microhardness reduction after cyclic loads on shotpeened astm a516 grade 70 steel |
| publisher |
Trans Tech Publications Ltd |
| publishDate |
2023 |
| _version_ |
1806428499731283968 |