The national side finished fourth after a tight loss to England by just one wicket with two balls remaining in the third-place playoff on Friday.
Making his World Cup debut, Joondalup’s Morgan amassed 148 runs from five matches over the two weeks of the Dubai-hosted competition.
Only opening batsman Matt Short (196) and middle-order maestro Jake Doran (249) produced bigger totals across those five games.
Doran was particularly prolific with an average of 83, boosted by two unbeaten innings of 99 and 49.
Morgan did not play in the third-place playoff, the side’s sixth match.
He described the World Cup experience as ‘unbelievable’.
‘Coming over here just by itself is awesome, but playing cricket is even better,’ he said.
The South African-born left hander led scoring with 55 as part of a 107-run opening stand with Short in the side’s five-wicket quarter-final victory over the West Indies.
He told Cricket Australia’s media team it ‘felt good’ to finally get past 40.
His half-century bettered the captain’s knock of 47 he delivered when he skippered Australia in its shock group loss to Afghanistan.
The 18-year-old faced the country of his birth for a place in the World Cup final, but fell for 12 as the Proteas triumphed with a comfortable 80-run victory.
He said reaching the semi-final had been a ‘bit of pressure’ and a ‘bit of excitement’.