TY - JOUR
T1 - Effect of shot peening forming and shot peening strengthening post-treatment on the fatigue behavior of bolt-connected 2024HDT alloy
AU - Wu, Junnan
AU - Liu, Daoxin
AU - Guan, Yanying
AU - Shi, Hailan
AU - Cheng, Shumin
AU - Shi, Jianmeng
AU - He, Xueting
AU - Fu, Xiaoqiang
N1 - Publisher Copyright:
© 2023 Elsevier Ltd
PY - 2023/12/1
Y1 - 2023/12/1
N2 - To improve surface integrity and suppress fretting fatigue of bolt-connected 2024HDT alloy plate-hole structure, the effect of shot peening forming (SPF) and shot peening strengthening (SPS) post-treatment on the surface integrity and fatigue behavior of 2024HDT alloy was investigated. The results showed that the SPF treatment increased the fretting fatigue resistance of the 2024HDT alloy plate-hole structure, and the failure mode changed from fretting fatigue to plain fatigue. The SPS post-treatment with three different intensities investigated here all improved the plain fatigue resistance of the SPF sample, whose failure mode also manifested as plain fatigue. This was due to the SPS treatment that flattened the surface of the SPF sample and introduced a compressive residual stress (CRS) field with a larger value and deeper distribution, while increasing the dislocation density and hardness of the SPF sample, which suppressed the initiation and propagation of fatigue cracks. SPS with a medium intensity produced an excellent surface CRS field with the lowest roughness and slightest surface damage, resulting in an improved plain fatigue resistance of 7.92%.
AB - To improve surface integrity and suppress fretting fatigue of bolt-connected 2024HDT alloy plate-hole structure, the effect of shot peening forming (SPF) and shot peening strengthening (SPS) post-treatment on the surface integrity and fatigue behavior of 2024HDT alloy was investigated. The results showed that the SPF treatment increased the fretting fatigue resistance of the 2024HDT alloy plate-hole structure, and the failure mode changed from fretting fatigue to plain fatigue. The SPS post-treatment with three different intensities investigated here all improved the plain fatigue resistance of the SPF sample, whose failure mode also manifested as plain fatigue. This was due to the SPS treatment that flattened the surface of the SPF sample and introduced a compressive residual stress (CRS) field with a larger value and deeper distribution, while increasing the dislocation density and hardness of the SPF sample, which suppressed the initiation and propagation of fatigue cracks. SPS with a medium intensity produced an excellent surface CRS field with the lowest roughness and slightest surface damage, resulting in an improved plain fatigue resistance of 7.92%.
KW - 2024HDT aluminum alloy
KW - Fatigue resistance
KW - Shot peening forming
KW - Shot peening strengthening
KW - Surface integrity
UR - http://www.scopus.com/inward/record.url?scp=85175631112&partnerID=8YFLogxK
U2 - 10.1016/j.engfracmech.2023.109690
DO - 10.1016/j.engfracmech.2023.109690
M3 - 文章
AN - SCOPUS:85175631112
SN - 0013-7944
VL - 293
JO - Engineering Fracture Mechanics
JF - Engineering Fracture Mechanics
M1 - 109690
ER -