scholarly journals Improvement of Fatigue Strength of Fillet Welded Joint by Water Jet Treatment of Weld Toe Region.

1996 ◽  
Vol 14 (3) ◽  
pp. 601-608 ◽  
Author(s):  
Shozaburo Ohta ◽  
Tetsuro Ishimura ◽  
Tetsuya Tamura
Keyword(s):  
Fatigue Strength ◽  
Welded Joint ◽  
Water Jet ◽  
Weld Toe

Effect of Hammer Peening Processing on Fatigue Property of Welded Joints After Overload

2013 ◽  
Author(s):  
Yasushi Morikage ◽  
Satoshi Igi ◽  
Kenji Oi
Keyword(s):  
Residual Stress ◽  
Fatigue Strength ◽  
Compressive Stress ◽  
Welded Joints ◽  
Compressive Residual Stress ◽  
Welded Joint ◽  
Fatigue Property ◽  
Weld Toe ◽  
Hammer Peening ◽  
General Method

One general method for improving the fatigue strength of welded joints is introduction of compressive residual stress by peening. However, there is concern that the fatigue strength of the welded joint may decrease if excessive preloading is applied after peening. It has been found that fatigue strength decreased after applying compressive preloading to a welded joint due to cancellation of the compressive stress at the weld toe. In the present research, the influence of excessive preloading on the fatigue strength of welded joints with compressive residual stress at the weld toe was clarified by experiments using hammer peening with an improved pin. When hammer peening was applied to welded joints, increasing the radius of the weld toe reduced the decrease of compressive residual stress due to excessive preloading. As a result, the decrease of the fatigue strength of the welded joint was also reduced.

Effect of Weld Toe Burr Grinding on Fatigue Strength of Transverse Welded Specimens Made From DH36 Steel

2009 ◽  
Author(s):  
Helena Polezhayeva ◽  
Joong-Kyoo Kang ◽  
Joo-Ho Heo ◽  
Kwang-Seok Kim
Keyword(s):  
Fatigue Life ◽  
Fatigue Strength ◽  
High Cycle Fatigue ◽  
Welded Joint ◽  
Cycle Fatigue ◽  
Constant Amplitude ◽  
Joint Project ◽  
Improvement Factor ◽  
Weld Toe ◽  
Marine Engineering

The effect of weld toe grinding on fatigue life of welded joint has been studied by a number of investigators who have established that improvement factor on fatigue life is greater for higher tensile steels as compared with mild steels [1]. To establish the effect of weld toe grinding on the fatigue strength of joints made from DH36 steel, transverse welded specimens were tested under constant amplitude loading. This work was carried out by DAEWOO Shipbuilding and Marine Engineering Co. within Lloyds Register/DSME Joint Project. It was shown that the improvement factor on fatigue strength due to weld toe burr grinding for DH36 steel is above 1.5 for high cycle fatigue range.

Effect of strong shot peening cleaning and hot galvanizing on fatigue strength of steel welded joint

2009 ◽  
Vol 23 (5) ◽  
pp. 360-368 ◽  
Author(s):  
Masayoshi Hasegawa ◽  
Hiroaki Suzuki ◽  
Ken Miura
Keyword(s):  
Fatigue Strength ◽  
Shot Peening ◽  
Welded Joint
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