Page 188 - 《摩擦学学报》2021年第5期
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第 5 期 沈明学, 等: 轮轨界面摩擦学转变结构层特性及其研究进展 777
(b)
Upper interface
(a)
White etching layer
Stratification
Brown etching layer
Pearlite (P) = parent matrix 10 μm
Lower interface
10 μm
[17]
Fig. 3 Structure of stratified layers : (a) optical microscopy (OM) micrograph, (b) scanning electron
microscopy (SEM) micrograph.
[17]
图 3 分层结构 : (a)光学显微镜图片(OM),(b)扫描电子显微镜图片(SEM)
(a) (b)
Rail WEL
Pearlite
2 μm 10 μm
(c) (d)
White sublayer Al-1
BEL
Int-1
Int-1a
Matrix
ND ND
Brown sublayer
RD 1 μm RD 1 μm
[31]
Fig. 4 Lamellar features in the TTS layer: (a) the multidirectional lamellar structure within WEL ; (b) unidirectional lamellar
[31] [18]
structure near the interface between WEL and substrate ; (c) the “gullies” feature in BEL ; (d) lamellar structure
[18]
near the interface between BEL and matrix
图 4 TTS层中的片状特征:(a)WEL内的多向片层状结构 ;(b)WEL与基体界面附近的单向片层状结构 ;
[31]
[31]
(c)BEL内的“沟壑”特征 ;(d)BEL与基体界面附近的片层状结构 [18]
[18]
[32]
明显的“沟壑”特征,如图4(d)所示. Zhu等 对OM[图5(a)] 发现低倍下两个不同颜色的区域均较光滑,高倍观察
下呈白色和淡黄色的TTS区域进行了SEM观察[见图5(b)], 表明:白色区域内微观结构较为光滑且均匀[见图5(c)],