On Shear Testing of Single Crystal Ni-Base Superalloys
On Shear Testing of Single Crystal Ni-Base Superalloys
复制标题
单晶镍基高温合金的剪切试验研究
DOI:
10.1007/s11661-018-4726-9
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发表时间:
2018
期刊:
影响因子:
--
通讯作者:
G. Laplanche
中科院分区:
文献类型:
--
作者:
G. Eggeler;N. Wieczorek;F. Fox;S. Berglund;D. Bürger;A. Dlouhy;P. Wollgramm;K. Neuking;J. Schreuer;L. Agudo Jácome;S. Gao;A. Hartmaier;G. Laplanche
Shear testing can contribute to a better understanding of the plastic deformation of Ni-base superalloy single crystals. In the present study, shear testing is discussed with special emphasis placed on its strengths and weaknesses. Key mechanical and microstructural results which were obtained for the high-temperature (T≈ 1000 °C) and low-stress (τ≈ 200 MPa) creep regime are briefly reviewed. New 3D stereo STEM images of dislocation substructures which form during shear creep deformation in this regime are presented. It is then shown which new aspects need to be considered when performing double shear creep testing at lower temperatures (T< 800 °C) and higher stresses (τ> 600 MPa). In this creep regime, the macroscopic crystallographic [11−2](111) shear system deforms significantly faster than the [01−1](111) system. This represents direct mechanical evidence for a new planar fault nucleation scenario, which was recently suggested (Wuet al. in Acta Mater 144:642–655, 2018). The double shear creep specimen geometry inspired a micro-mechanicalin-situshear test specimen. Moreover, thein-situSEM shear specimen can be FIB micro-machined from prior dendritic and interdendritic regions. Dendritic regions, which have a lowerγ′ volume fraction, show a lower critical resolved shear stress.
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影响因子:
6
作者:
C. Tromas;M. Arnoux;X. Milhet
通讯作者:
C. Tromas;M. Arnoux;X. Milhet
DOI:
--
发表时间:
1977
期刊:
影响因子:
--
作者:
U. Alpen;J. Doukhan
通讯作者:
J. Doukhan
影响因子:
9.4
作者:
A. Parsa;P. Wollgramm;H. Buck;A. Kostka;C. Somsen;A. Dlouhý;G. Eggeler
通讯作者:
A. Parsa;P. Wollgramm;H. Buck;A. Kostka;C. Somsen;A. Dlouhý;G. Eggeler
影响因子:
9.4
作者:
N. Wieczorek;G. Laplanche;J.-K. Heyer;A.B. Parsa;J. Pfetzing-Micklich;G. Eggeler
通讯作者:
G. Eggeler
DOI:
--
发表时间:
1997
期刊:
Proceedings of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences
影响因子:
--
作者:
L. Pan;B. Shollock;M. Mclean
通讯作者:
M. Mclean