In order to research the energy absorption characteristics of high-strength steels in vehicles, the single-hat thin-walled structural components were made from quenching and partitioning (Q&P) steel and dual-phase (DP) steel so as to understand the differences and superiority in the energy absorption characteristics of various types of steel in the energy-absorbing box of current vehicles. Crushing experiments were performed with a testing machine equipped with a high-speed camera. The energy absorption mechanism of the two steels was investigated by means of transmission electron microscopy and electron back-scattered diffraction. The results showed that the energy absorption capacity of Q&P steel is better than that of DP steel, which can be observed from the different compression distances of the single-hat thin-walled structure. The major contribution in energy absorption of Q&P steel comes from the internally retained austenite-to-martensite transformation. The amount of retained austenite substantially reduces at the crushed part with large deformation. On the other hand, while there is a large amount of dislocation and quantity of plug in the crushed DP steel part, the energy stays inside the material without dissipating.

为了研究车辆中高强度钢的能量吸收特性，由淬火和分配（Q＆P）钢和双相（DP）钢制成单帽薄壁结构部件，以了解它们之间的区别和区别。现有车辆的能量吸收箱中的各种钢的能量吸收特性上的优越性。使用配备有高速相机的测试机进行压碎实验。通过透射电子显微镜和电子背散射衍射研究了两种钢的能量吸收机理。结果表明，从单帽薄壁结构的不同压缩距离可以看出，Q＆P钢的能量吸收能力优于DP钢。Q＆P钢在能量吸收方面的主要贡献来自内部保留的奥氏体到马氏体的转变。残余奥氏体的量在变形较大的压碎部分处显着减少。另一方面，当压碎的DP钢部件中存在大量的错位和大量的堵塞时，能量会停留在材料内部而不会耗散。