Fatigue-Resistant Heterogeneous Gradient Nanocrystalline NiTi Shape Memory Alloy Fabricated by Pre-Strain Laser Shock Peening

Yan，Kai1,2; Wei，Pengbo1,2; Chu，Kangjie1; Wang，Hao4; He，Weifeng5,6; Ren，Fuzeng2; Sun，Qingping1,3

2022

10.1007/s40830-022-00367-0

Shape Memory and Superelasticity   影响因子和分区

2199-384X

2199-3858

NiTi shape memory alloy (SMA) has been widely used in many fields for its superelastic and shape memory behaviors. The compressive fatigue life of NiTi is very high, but the tensile and bending fatigue life is relatively low. In this study, pre-strain laser shock peening (LSP) is introduced to solve these challenges. Different heterogeneous nanostructured (containing B2, B19′ phases, and precipitates including NiTi and NiTi) gradient residual stress layers were created by controlling the pre-strain during LSP treatment. The highest bending fatigue life under the maximum tensile strain of 2.4% reached over 34,000 cycles, 33 times that of the untreated sample. The proposed pre-strain LSP method provides a new avenue to fabricate fatigue-resistant superelastic NiTi SMA.

Fatigue life Heterogeneous nanostructure Laser shock peening NiTi shape memory alloy Residual stress

ESCI ; EI

英语

通讯

Hong Kong Research Grant Council (RGC) through the GRF grant[16239316] ; National Science Foundation of China[52122102] ; Project of Hetao Shenzhen-Hong Kong Science and Technology Innovation Cooperation Zone[HZQB-KCZYB-2020083] ; Science, Technology and Innovation Commission of Shenzhen Municipality of China[SGDX2019081623360564]

Materials Science

Materials Science, Multidisciplinary

WOS:000810853800002

SPRINGER INT PUBL AG

20222412231544

Binary alloys ; Fabrication ; Fatigue of materials ; Nanocrystals ; Tensile strain

Nanotechnology:761 ; Mechanics:931.1 ; Crystalline Solids:933.1 ; Materials Science:951

2-s2.0-85131805465

Scopus

1.Department of Mechanical and Aerospace Engineering,The Hong Kong University of Science and Technology,Hong Kong
2.Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,Guangdong,518055,China
3.HKUST Shenzhen-Hong Kong Collaborative Innovation Research Institute,Shenzhen,Guangdong,518000,China
4.Chair of Applied Laser Technologies,Ruhr-Universität Bochum,Bochum,Universitätsstraße 150,44801,Germany
5.State Key Laboratory for Manufacturing Systems Engineering,School of Mechanical Engineering,Xi’an Jiaotong University,Xi’an,710049,China
6.Science and Technology on Plasma Dynamics Laboratory,Air Force Engineering University,Xi’an,710038,China

Yan，Kai,Wei，Pengbo,Chu，Kangjie,et al. Fatigue-Resistant Heterogeneous Gradient Nanocrystalline NiTi Shape Memory Alloy Fabricated by Pre-Strain Laser Shock Peening[J]. Shape Memory and Superelasticity,2022,8:107-117.

Yan，Kai.,Wei，Pengbo.,Chu，Kangjie.,Wang，Hao.,He，Weifeng.,...&Sun，Qingping.(2022).Fatigue-Resistant Heterogeneous Gradient Nanocrystalline NiTi Shape Memory Alloy Fabricated by Pre-Strain Laser Shock Peening.Shape Memory and Superelasticity,8,107-117.

Yan，Kai,et al."Fatigue-Resistant Heterogeneous Gradient Nanocrystalline NiTi Shape Memory Alloy Fabricated by Pre-Strain Laser Shock Peening".Shape Memory and Superelasticity 8(2022):107-117.