@article{article, title  = {{Optimisation of friction welding process parameters for 42Cr9Si2  hollow head & sodium filled engine valve and valve performance evaluation}},

 publisher = {{MPDI}},

 url = {{http://eprints.whiterose.ac.uk/144615/ }},

 year = {{2019}},

 month = {{4}},

 author = {{Lai F and Qu S and Lewis R and Slatter T and Sun G and Zhang T and Li X}},

 doi = {{10.3390/ma12071123}},

 volume = {{12}},

 journal = {{Materials}},

 issue = {{7}},

 note = {{Accessed on 2024/12/22}}}