where are you displaying this, in SSMS or in some SSRS report?
you can convert the values to varchar with a case statement, but is that what you want?
/*
object_id    create_date    StringDate
14675150    2017-06-08 11:46:34.517    2017-06-08 11:46:34
16771167    2017-08-10 14:12:29.613    2017-08-10 14:12:29
33435193    2016-12-13 15:05:33.830    2016-12-13 15:05:33
38291196    2016-10-14 00:00:00.000    2016-10-14
56387270    2016-11-15 14:31:42.447    2016-11-15 14:31:42
71671303    2016-08-03 00:00:00.000    2016-08-03
*/
DECLARE @SampleData TABLE([object_id] int,[create_date] datetime)

INSERT INTO @SampleData
SELECT '14675150','2017-06-08 11:46:34.517' UNION ALL
SELECT '16771167','2017-08-10 14:12:29.613' UNION ALL
SELECT '33435193','2016-12-13 15:05:33.830' UNION ALL
SELECT '38291196','2016-10-14 00:00:00.00' UNION ALL
SELECT '56387270','2016-11-15 14:31:42.447' UNION ALL
SELECT '71671303','2016-08-03 00:00:00.00'

SELECT *,
CASE
WHEN [create_date] = CONVERT(date,[create_date]) THEN CONVERT(varchar(10),[create_date],120)
ELSE CONVERT(varchar(30),[create_date],120)
END AS StringDate

FROM @SampleData