Data of dynamic microscale strain distributions of Ti-6Al-4V alloys in dwell fatigue tests

Qinghua Wang; Shien Ri; Akira Maenosono; Yoshihisa Tanaka; Motomichi Koyama

doi:10.1016/j.dib.2019.104338

Data of dynamic microscale strain distributions of Ti-6Al-4V alloys in dwell fatigue tests

Data Brief. 2019 Aug 13:25:104338. doi: 10.1016/j.dib.2019.104338. eCollection 2019 Aug.

Authors

Qinghua Wang¹, Shien Ri¹, Akira Maenosono², Yoshihisa Tanaka³, Motomichi Koyama²

Affiliations

¹ National Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology, 1-1-1 Umezono, Tsukuba, Ibaraki 305-8568, Japan.
² Department of Mechanical Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, Fukuoka, 819-0395, Japan.
³ Research Center for Structural Materials, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan.

Abstract

Dynamic microscale strain distributions with temporal resolution of 1 s in a smooth and a cracked Ti-6Al-4V alloys during one-cycle dwell fatigue tests are illustrated in videos (URL: https://drive.google.com/drive/folders/1pit_VV2apGOpETVfaJAAtL5Xl2CNOiJ3?usp=sharing). The tensile strain distributions were measured by the video sampling moiré method from the 1-μm-pitch grid images in a scanning electron microscope. The strain concentration factors of the smooth and the cracked specimens are 1.96 and 2.65, respectively. The plastic strain increment is 0.0007 during the displacement holding time of 591s in the smoothed specimen at maximum stress of 900 MPa., and 0.0008 during the displacement holding time of 593s in the cracked specimen at maximum stress of 870 MPa. The typical strain results are analyzed in 1-s-resolved strain mapping in Ti-6Al-4V alloys during dwell fatigue in SEM by video sampling moiré [1].

Keywords: Creep; Fatigue; Image processing; Plastic deformation; Scanning electron microscope; Strain.