Mechanistic Study of Rail Gouging during Hypersonic Rocket Sled Tests

Figure 3

Metallographic structure of Samples 1–1, 1–2, and 1–3. (a) Sample 1–1. (b) Transverse ground surface of Samples 1–2. (c) Longitudinal ground surface of Samples 1–2. (d) Samples 1–3.

(a)

(b)

(c)

(d)