1. Review of research on loosening of threaded fasteners

   • Hao Gong
   • Xiaoyu Ding
   • Huihua Feng

   Review Article Open access 05 June 2021 Pages: 335 - 359

2. Effect of contact geometry on the friction of acrylamide hydrogels with different surface structures

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   • Rok Simič
   • Nicholas D. Spencer

   Research Article Open access 23 November 2020 Pages: 360 - 373

3. Tribological behavior of black phosphorus nanosheets as water-based lubrication additives

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   • Tingli Hou
   • Kuaishe Wang

   Research Article Open access 09 January 2021 Pages: 374 - 387

4. Direct observation of the impact of water droplets on oil replenishment in EHD lubricated contacts

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   • Jintao Wang
   • Dan Guo

   Research Article Open access 26 January 2021 Pages: 388 - 397

5. Regulating the Nb₂C nanosheets with different degrees of oxidation in water lubricated sliding toward an excellent tribological performance

   • Hao Cheng
   • Wenjie Zhao

   Research Article Open access 11 January 2021 Pages: 398 - 410

6. Surface modification of YS-20 with polydopamine for improving the tribological properties of polyimide composites

   • Liangfei Wu
   • Zhaozhu Zhang
   • Xuehu Men

   Research Article Open access 17 March 2021 Pages: 411 - 421

7. Investigation of the heat distribution in dry friction systems during fade and recovery using fiber-optic sensing and infrared technology

   • Albert Albers
   • Thomas Klotz
   • Sascha Ott

   Research Article Open access 09 June 2021 Pages: 422 - 435

8. Tribological behavior comparisons of high chromium stainless and mild steels against high-speed steel and ceramics at high temperatures

   • Shaogang Cui
   • Yangzhen Liu
   • Wei Li

   Research Article Open access 15 June 2021 Pages: 436 - 453

9. Experimental and modelling study of interaction between friction and galling under contact load change conditions

   • Xiao Yang
   • Yiran Hu
   • Li-liang Wang

   Research Article Open access 09 July 2021 Pages: 454 - 472

10. Impact-sliding wear response of 2.25Cr1Mo steel tubes: Experimental and semi-analytical method

    • Meigui Yin
    • Chaise Thibaut
    • Zhenbing Cai

    Research Article Open access 19 October 2021 Pages: 473 - 490