TY - JOUR T1 - Optimisation of friction welding process parameters for 42Cr9Si2 hollow head & sodium filled engine valve and valve performance evaluation JO - Materials UR - http://eprints.whiterose.ac.uk/144615/ PY - 2019/04/05 AU - Lai F AU - Qu S AU - Lewis R AU - Slatter T AU - Sun G AU - Zhang T AU - Li X ED - DO - DOI: 10.3390/ma12071123 PB - MPDI VL - 12 IS - 7 Y2 - 2025/05/25 ER -